Washington weather by month › September
Washington in September: weather and what to expect
It’s fine, but not the best. May is more pleasant.
September weather in Washington
Daytime high81°F 27°C
Night low60°F 16°C
Rain4.4 in 111 mm
AirA little humid
SunSunny
In September, Washington averages highs of 81°F (27°C) and lows of 60°F (16°C), with 4.4 in (111 mm) of rain. The air feels a little humid and the sun is sunny. 1991–2020 averages, not a forecast.
Pack: light clothes and sun protection, a rain jacket or umbrella.
Places with the same weather in September
Match out of 100 for September, one city per country.
- Cheonan South Korea · 79°F highs93
- Sanmenxia China · 79°F highs92
- Naples Italy · 81°F highs90
- León de los Aldama Mexico · 83°F highs90
- Tirana Albania · 81°F highs90
- Foz do Iguaçu Brazil · 81°F highs90
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