Washington Weather in September
September in Washington sees daytime temperatures around 27°C (81°F) and lows of 14°C (57°F) at night. With around 111 mm (4.4 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Washington in September
This month experiences about 9 days of rain according to historical data, averaging 111 mm (4.4 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Washington in September
September in Washington brings typical temperatures with highs around 27°C (81°F) and lows of 14°C (57°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 14°C (57°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Washington.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Washington's climate page.
Washington Temperature in September
Min Temperature
14°C (57°F)
Max Temperature
27°C (81°F)
Chance of Rain
30%
Precipitation
111 mm (4.4 in)
Rainy days
9 days
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Washington in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes.What To Do in Washington in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Washington's climate page.
See the full Washington climate overview or explore weather in the United States of America.
