PM Update: Clouds Lead the Way for Autumn
Humidity levels on the rise, a few showers possible
Our run of pleasant days continued today as mostly clear skies this morning slowly transition cloudier. Increasing clouds now will bring increasing rain chances later, but we will make it through the evening without any weather worries. Highs topping out mainly in the upper 70s to near 80 stay fairly mild tonight, at least compared to recently, thanks to the cloudiness and higher humidity moving in.
Through Tonight: Clouds will be on the increase this evening and lead to a mostly cloudy overnight. Rising humidity levels and clouds keep temperatures from falling below the 60-65 range most spots. There's a risk of a passing shower after midnight, especially for far western suburbs, but I'd guess most spots stay dry.
Tomorrow (Tuesday): It will be mostly cloudy with a slight chance of a shower early giving way to a bit better shot during the afternoon into evening. Even during the afternoon, activity should be isolated to scattered and no significant rainfall is expected on Tuesday. Highs look to range from the mid-70s to around 80, though we'll likely need some sun to get to the high end of the range. Humidity keeps ticking up back toward summer-like levels.
Autumn in D.C.: As Jason reminded this morning, autumn officially arrives tomorrow at 5:18 p.m. While the first few weeks of autumn are often quite beautiful around here, with plentiful crisp morning lows rising to mild afternoon highs, we lose quite a bit off warmth from start to finish. On the first full day of fall (this Wednesday), averages at National Airport are 77F for a high and 59F for a low. By the end of the season, averages have fallen to 46F and 31F.
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