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Check out the total extent of the ocean warmth from last month... Data from NOAA OISSTv2.1 🌊

Global map showing sea surface temperature anomalies in August 2026 relative to 1982 to 2010. Most areas are warmer than average. Red is shown for warmer sea surface temperatures, and blue is shown for colder sea surface temperatures. Data is from NOAA OISSTv2.1.

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Trends in September temperatures over land areas for the last 50 years... note some of the regional hotspots in the darker red shading Data from www.ncei.noaa.gov/products/lan...

Global map showing surface air temperature trends for each September from 1976 to 2025. Only land areas are shown. Red shading is shown for warmer temperature trends, and blue shading is shown for colder temperature trends. Data is from NOAA/NESDIS/NCEI NOAAGlobalTempv6.0.0. The temperature trend scale is from -0.5°C/decade to +0.5°C/decade. Most all areas are warming.

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Monday ice update - #Arctic sea ice extent is currently the 16th lowest on record (JAXA data) • about 320,000 km² above the 2010s mean • about 720,000 km² below the 2000s mean • about 1,890,000 km² below the 1990s mean • about 2,590,000 km² below the 1980s mean More: zacklabe.com/arctic-sea-i...

Line graph time series of 2026's daily Arctic sea ice extent compared to decadal averages from the 1980s to the 2010s. The decadal averages are shown with different colored lines with purple for the 1980s, blue for the 1990s, green for the 2000s, and white for the 2010s. Thin white lines are also shown for each year from 2000 to 2025. 2026 is shown with a thick gold line. There is a long-term decreasing trend in ice extent for every day of the year shown on this graph between August and October by looking at the decadal average line positions.

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Zack Labe @zacklabe.com · 27/09/2026

Comparing monthly average temperature anomalies in the Northern Hemisphere versus the Southern Hemisphere through August 2026 (record warm). The climate change trend in all months of the year can be visualized through the blue to red gradient. Data available via @copernicusecmwf.bsky.social ERA5.

Line graph time series of monthly mean surface temperature anomalies for the Northern Hemisphere region only. Every month is shown from 1940 to August 2026. There is a long-term warming trend in all months of the year.

Line graph time series of monthly mean surface temperature anomalies for the Southern Hemisphere region only. Every month is shown from 1940 to August 2026. There is a long-term warming trend in all months of the year.

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The last three months are the warmest on record globally, relative to every other June-July-August period since 1850. Data from NOAA/NCEI's NOAAGlobalTempv6.1.0.

Line graph time series of global land mean surface temperature anomalies for each June-August period from 1850 through 2026. There is a long-term increasing trend and large year-to-year variability. The mean surface temperature anomaly averaged for June-August 2026 was 1.21°C for global land areas. Anomalies are computed relative to a 1901-2000 climate baseline. Data from NOAA/NESDIS/NCEI NOAAGlobalTemp v6.1.0.

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Zack Labe @zacklabe.com · 27/09/2026

Last month showed unusually warm sea surface temperatures across much of the #Arctic Ocean, especially in the Kara Sea, Baffin Bay, & Labrador Sea. There's been an interesting contrast in ocean temperature departures across the East Siberian Sea, as well as some lingering ice Data: NOAA OISSTv2.1 🌊

Polar stereographic map showing sea surface temperature anomalies in August 2026 relative to 1982 to 2010. Most areas are warmer than average. Sea-ice cover is also shown if sea-ice concentration is at least 15% per each grid point. Red is shown for warmer sea surface temperatures, and blue is shown for colder sea surface temperatures. Data is from OISSTv2.1.

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Zack Labe @zacklabe.com · 26/09/2026

My next 'climate viz of the month' blog is posted, which summarizes this past summer across the Arctic after recently reaching the September annual minimum for sea-ice extent: zacklabe.com/climate-viz-... #SciComm #OpenScience #OpenData #DataViz

zacklabe.com

Climate Viz of the Month

August 2026 Hi all! The Northern Hemisphere summer has come and gone, and with relatively little fanfare in the Arctic this year. That doesn’t mean there were not areas of climate extremes or that …

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Zack Labe @zacklabe.com · 26/09/2026

Good morning! Monthly climate change indicator update time... 🫣 + Global temperature: 📈 + Carbon dioxide (CO₂): 📈 + Methane (CH₄): 📈 + Nitrous oxide (N₂O): 📈 Download at zacklabe.com/climate-chan...

This graphic shows four line graph time series and each are monthly from January 1984 through August 2026. The first graph is a 12-month running mean of global mean surface temperature anomalies. Anomalies are computed relative to a 1991-2020 baseline using ERA5 data. The second graph is monthly carbon dioxide abundance. The CO2 graph is the Keeling Curve. Current levels are 428 ppm. The third graph is monthly global methane abundance. Current levels are 1939 ppb. The fourth graph is monthly global nitrous oxide abundance. Current levels are 340 ppb. The three greenhouse gases show seasonal cycles and long-term increasing trends using data from NOAA GML. The global mean surface temperature anomaly record also exhibits decadal variability and a long-term increasing trend. All graphs are rising and shown in four different colors, including white, yellow, orange, and pink.

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Zack Labe @zacklabe.com · 25/09/2026

Quick oceans update: yah, sea surface temperatures remain in new territory this year. See more at zacklabe.com/climate-chan.... This data (extrapolar ocean) is provided by @copernicusecmwf.bsky.social ERA5. 🌊

Graph showing daily global mean sea surface temperatures for 2026. This is also compared to the daily data from the 1981-2010 average and 1991-2020 average. Annotations are also shown to the current year with the other years from 1940 to 2026. There is a seasonal cycle. There is a long-term warming trend. 2023 and 2024 are also indicated, which were the warmest years on record. Data is from ECMWF ERA5 reanalysis and updated through 23 September 2026.

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Zack Labe @zacklabe.com · 25/09/2026

Friday ice update - #Arctic sea ice extent is currently the 16th lowest on record (JAXA data) • about 280,000 km² above the 2010s mean • about 770,000 km² below the 2000s mean • about 1,920,000 km² below the 1990s mean • about 2,640,000 km² below the 1980s mean More: zacklabe.com/arctic-sea-i...

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Zack Labe @zacklabe.com · 25/09/2026

All latitude bands outside of the Antarctic saw above average temperatures over the last 3 months. The tropical warming is notable, which is partly associated with El Niño. [Plot shows zonal-mean surface air temperature anomalies, where latitude = y-axis (not scaled by distance). Data: GISTEMPv4]

Bar graph showing zonal mean surface air temperature anomalies for the period of June 2026 to August 2026. Most all latitude bands, except the Antarctic, observed above average temperature anomalies, especially in the Northern Hemisphere.

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The first nor'easter of the season will bring big impacts to coastal areas around the Northeast this weekend. Learn more in www.climatecentral.org/climate-shif... "Human-caused climate change is also contributing to rising sea levels and exacerbating flooding outlooks along the East Coast. "

Map of Climate Shift Index: Ocean for 23 September showing the change in current sea surface temperature likelihood due to climate change. Most all areas in the Western Atlantic are at least 10x more likely due to climate change. Data is based on NOAA OISSTv2.1.

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Large portions of the #Arctic Ocean are getting wetter in the month of September. The largest trends are found in the Barents-Kara Seas and toward eastern Greenland. + Data from GPCP: psl.noaa.gov/data/gridded... + More info: doi.org/10.25923/11n...

Polar stereographic map showing September precipitation trends over the period of 1979 to 2025. Nearly all areas are getting wetter across the Arctic in this month. Data is from GPCP.

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The global mean temperature over the last 3 months was record warm (June-July-August). We don't truly experience the global mean of course, so here's a look at those departures regionally around the world... 🟥 warmer than average 🟦 colder than average Dataset described in doi.org/10.1175/BAMS...

Global map showing surface air temperature anomalies for the June 2026 to August 2026 period across the entire planet. Most all areas were warmer than average. This data set is from NOAA's NOAAGlobalTempv6.1.0 using anomalies with a 1991-2020 climate baseline. Red is shown for warmer than average temperatures, and blue is shown for colder than average temperatures.

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Autumnal equinox marks start of fall, but heat could stick around

"Every El Niño has its own flavor. Each one is different. And so that's really important to keep in mind." via @usatoday.com at www.usatoday.com/story/news/w...

usatoday.com

Fall officially starts on Sept. 22, but the temperatures still may be warmer than expected.

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🚨 It's official - 2026 observed the 10th lowest annual minimum #Arctic sea ice extent (statistical tie). My next climate viz blog will focus on this past summer season. This minimum was set 2 days earlier than average. For more information: @nsidc.bsky.social at nsidc.org/sea-ice-toda...

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Mark Gongloff @markgongloff.bsky.social · 23/09/2026

Wednesday El Niño update - Unsurprisingly, sea surface temperatures still remain record warm across the central Pacific. But when discussing headlines like the “strongest” El Niño, it’s an oversimplification to ignore the role of long-term tropical warming (from climate change). Data: OISSTv2.1 🌊

Map of September 21, 2026 average sea surface temperature anomalies in the ENSO monitoring regions. Data is from NOAA OISSTv2.1 with anomalies relative to a 1991-2020 baseline.

Graphic showing the 4-week change in sea surface temperature anomalies across the tropical eastern Pacific Ocean from August 22, 2026 to September 21, 2026. Data is from NOAA OISSTv2.1

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Reposted by Zack Labe

Urban heat island effects are bad enough. Clustering data centers in cities, each of which can produce the heat of 54,000 houses, will make it exponentially worse, especially in already hot places like Phoenix Gift link to this great @bloomberg.com infographic: www.bloomberg.com/graphics/202...

bloomberg.com

AI Data Centers Release Heat, Posing New Problem for Cities

As facilities to power AI grow larger and are built in clusters, they are spreading hot air beyond their property lines

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"As August came to a close, nearly 8.3 million acres had burned across the U.S., setting a year-to-date record. This isn’t particularly surprising." ➡️ Read our latest monthly state of the climate report: www.climatecentral.org/climate-brie.... Download and share more global/US climate visuals too.

A map of the United States showing notable weather and climate events in August 2026. Examples are shown for tornadoes in Pennsylvania, record precipitation in the Ohio Valley, extreme heat in Miami, rapid drought onset in Texas, Hurricane Lala in Hawaii, damaging wildfires in Alaska, nighttime warmth in the Southwest, wildfires in the Pacific Northwest, central U.S. severe weather, and tornadoes in Illinois. The graphic is produced by Climate Central using NOAA data and information. More information at https://www.climatecentral.org/climate-briefings.

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Zack Labe @zacklabe.com · 22/09/2026

Watch the changes in 100 years of changing June-July-August temperature anomalies over land areas through 2026 (second highest on record)... Data from NOAAGlobalTemp v6.1.0: www.ncei.noaa.gov/products/lan...

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Happy September equinox 2026! Enjoy your week! 🌞 Understanding seasons - graphic shows the incoming solar radiation around the two equinoxes (sun passes over the equator)... Download this visualization at zacklabe.com/arctic-clima...

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Zack Labe @zacklabe.com · 22/09/2026

Monday ice update - #Arctic sea ice extent is currently the 14th lowest on record (JAXA data) • about 180,000 km² above the 2010s mean • about 910,000 km² below the 2000s mean • about 2,030,000 km² below the 1990s mean • about 2,730,000 km² below the 1980s mean More: zacklabe.com/arctic-sea-i...

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Zack Labe @zacklabe.com · 21/09/2026

Temperature departures averaged over the last month (left), 3 months (center), and 12 months (right) across the Northern Hemisphere... Data from @copernicusecmwf.bsky.social ERA5 reanalysis.

Three orthographic maps showing 2-m air temperature anomalies in August 2026, June 2026 to August 2026, and September 2025 to August 2026. Red shading is shown for warmer anomalies, and blue shading is shown for colder anomalies. Most areas are warmer than average. The mean temperature anomaly for each map is also displayed. Anomalies are calculated relative to a 1981-2010 baseline.

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Zack Labe @zacklabe.com · 19/09/2026

The average global temperature so far this year (for the January-August period) is now up to the 2nd warmest on record since the start of this dataset... This data is using NOAAGlobalTempv6.1.0: www.ncei.noaa.gov/products/lan...

Line graph time series of global land mean surface temperature anomalies for each January-August period from 1850 through 2026. There is a long-term increasing trend and large year-to-year variability. The mean surface temperature anomaly averaged for January-August 2026 was 1.16°C for global land areas. Anomalies are computed relative to a 1901-2000 climate baseline. Data from NOAA/NESDIS/NCEI NOAAGlobalTemp v6.1.0.

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Zack Labe @zacklabe.com · 19/09/2026

"All of this analysis, the stats, the records is here to show one thing. We are having a profound climate impact on billions of people right now. Not five, ten, fifteen years from now. But right now." ➡️ Check out our latest state of the climate webinar: www.youtube.com/watch?v=GrXC...

youtube.com

Climate Central’s Monthly Briefing Highlights: August 2026

YouTube video by Climate Central

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Zack Labe @zacklabe.com · 18/09/2026

Friday ice update - #Arctic sea ice extent is currently the 13th lowest on record (JAXA data) • about 190,000 km² above the 2010s mean • about 930,000 km² below the 2000s mean • about 2,050,000 km² below the 1990s mean • about 2,750,000 km² below the 1980s mean More: zacklabe.com/arctic-sea-i...

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Zack Labe @zacklabe.com · 18/09/2026

The latest observations of monthly-averaged greenhouse gases including carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O)... Access the data at gml.noaa.gov/ccgg/trends/

Graphic shows three line graph time series of monthly carbon dioxide abundance in ppm (blue line), monthly methane abundance in ppb (red line), and monthly nitrous oxide in ppb (purple line). Graphs are all shown from January 1984 through May 2026/August 2026. Current levels of CO2 are 428 ppm. Current levels of methane are 1939 ppb. Current levels of nitrous oxide are 340 ppb. All graphs show long-term increasing trends along with some interannual variability and seasonality.

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Reposted by Zack Labe

Callan Bentley @callanbentley.bsky.social · 17/09/2026

@zacklabe.com That was a really superb briefing you did for @climatecentral.org today - Very professional, well articulated, well illustrated, succinct (and yet information packed). Overall very thought provoking & very well done. Thank you. ⚒️

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Reposted by Zack Labe

Shel Winkley @shelwinkleywx.bsky.social · 17/09/2026

Just in from @zacklabe.com: August 2026 was the WARMEST on record globally. - 2nd Warmest for Global land temperatures - All-time warmest for August when it came to global ocean heat

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Zack Labe @zacklabe.com · 17/09/2026

Trends in September #Arctic sea ice thickness over approximately the last four decades (yes, that shows thinning everywhere)... Data from PIOMAS. For more information: doi.org/10.1175/JCLI...

Polar stereographic map showing decadal trends in Arctic sea ice thickness for Septembers from 1979 to 2025. All areas are experiencing thinning ice, which is shown with a red color shading. Thickness trends are shown in units of meters per decade.

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Zack Labe @zacklabe.com · 17/09/2026

47 years of average annual sea ice thickness across the #Arctic... 🌊❄️🥼 Graphic now available to include 2025 at: zacklabe.com/arctic-sea-i...

Collection of small polar stereographic maps showing the average yearly Arctic sea-ice thickness for each year from 1979 to 2025. There is large spatial variability, but a long-term decreasing trend. The thickness of ice ranges from 0 meters to more than 5 meters.

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Zack Labe @zacklabe.com · 17/09/2026

Watch the changes in 100 years of average January-August temperature anomalies over land areas through 2026... Data from NOAAGlobalTemp v6.1.0: www.ncei.noaa.gov/products/lan...

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Zack Labe @zacklabe.com · 16/09/2026

Maps of temperature departures averaged over the last month (left), 3 months (center), and 12 months (right) across the #Arctic... Data from doi.org/10.24381/cds...

Three orthographic maps showing 2-m air temperature anomalies in August 2026, June 2026 to August 2026, and September 2025 to August 2026 in the Arctic region. Red shading is shown for warmer anomalies, and blue shading is shown for colder anomalies. Most areas are warmer than average. The mean temperature anomaly for each map is also displayed. Anomalies are calculated relative to a 1981-2010 baseline.

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Zack Labe @zacklabe.com · 16/09/2026

Sea surface temperatures in the key Niño 3.4 region have been at record highs since early June (climate change plus El Niño), now more than 1°C above the 1997 record this week! 😬 Bring your El Niño questions and more to our free webinar tomorrow (sign up): climatecentral-org.zoom.us/webinar/regi...

Line graph time series of daily Nino 3.4 sea surface temperatures from 1982 to 2026. This year is currently a record high for this time of year through September 14, 2026. Data is from NOAA OISSTv2.1, and the graphic is created by Climate Central at https://www.climatecentral.org/climate-briefings.

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Zack Labe @zacklabe.com · 16/09/2026

Last month saw a very large temperature anomaly gradient between the Weddell Sea region and West #Antarctica. In fact, this was one of the very few places anywhere on the globe with colder than average temperatures in August, especially compared to older baselines (e.g., 1951-1980). Data from ERA5.

Polar stereographic map of 2-m air temperature anomalies in the Antarctic for August 2026. Red shading is shown for warmer anomalies, and blue shading is shown for colder anomalies. There is a lot of variability in the pattern of temperature anomalies across the continent. Anomalies are calculated relative to a 1981-2010 baseline.

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Temperatures across the Tropics set another monthly record in August 2026. The long-term warming trend is also very clear for all times of the year (i.e., human-caused climate change), which leads to growing heat stress impact concerns. Data from @copernicusecmwf.bsky.social ERA5 reanalysis.

Line graph time series of monthly mean surface temperature anomalies for the Tropics region only. Every month is shown from 1940 to 2026. There is a long-term warming trend in all months of the year.

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Here are the latest monthly-averaged observations of global methane (CH₄; a potent greenhouse gas)... May 2026 - 1939.4 ppb May 2025 - 1933.2 ppb + Data: gml.noaa.gov/ccgg/trends_... + More info on trends: doi.org/10.1126/scie...

Red colored line graph time series of global atmospheric methane abundance from January 1984 through May 2026. Methane abundance is measured in units of parts per billion. Current levels are 1939 ppb. A seasonal cycle is visible on the graph. There is also decadal variability and a long-term increasing trend.

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Simulated reconstruction of September #Arctic sea ice thickness since 1901. Large interannual variability and widespread thinning in recent years. Information about this data set is available at doi.org/10.1175/JCLI...

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