The main forecast challenge is how far south a cold front reaches on Saturday, and then how far north it comes back on Sunday as low pressure develops along it.

The month battles for nice weather supremacy with September and has fewer tropical storm threats.

September brought 4.26 inches of rain to DC, helping ease drought concerns while the year’s total remains below average. The month was also warmer than average.

Calmer weather is expected after this past weekend's nor'easter, but there is still shower potential.

See radar and warnings, national observations and satellite imagery, severe weather and flood outlooks, storm reports, precipitation forecasts, air travel alerts, and road conditions across the…

DC could flirt with 90 on Friday before a cooler pattern brings highs in the 60s to near 70 starting this weekend.

D.C.’s fall outlook favors mild weather, slightly delayed and uneven foliage, coastal storm threats, and little reason to expect an early freeze or snow.

Much calmer weather is expected after this past weekend's nor'easter, but there is some shower potential.

Highs climb into the 80s with increasingly muggy conditions, and some spots could make a run at 90 by Friday.

The storm largely spared the DC area while unleashing powerful winds, large waves and significant flooding along the coast.

It shouldn't be a sustained heavy rain, but it won't exactly be pleasant.

It won’t be too pleasant in the stands, but hard to say if it’ll be wet enough to delay this season finale.

Rainfall has generally matched expectations, with the highest amounts east of DC and additional showers likely through Sunday evening.

Some periods of light rain seem possible around Northwest Stadium from about noon onward.

A slow-moving nor’easter is battering the Maryland and Delaware beaches with damaging winds, coastal flooding and powerful surf.

A coastal storm could bring periods of rain to the region, with the highest amounts favored east and northeast of DC.

The first full moon of autumn brings a unique string of closely spaced moonrises that once helped farmers extend their harvest days.

Water levels 1 to 3 feet above normal are causing flooding along the tidal Potomac, Chesapeake Bay and Atlantic Coast.

The Smithsonian's National Air and Space Museum will be the site of the 16th annual Astronomy Festival on the National Mall.

Another chilly morning is expected Friday before temperatures gradually moderate into next week.

Late week into the weekend, the DC area should stay on the storm’s fringes with gusty winds and minor coastal flooding. Heavier rain, stronger winds, and battering waves target the coast, especially…

A look at the science and seasonal changes tied to the official start of fall.