Washington Weather in September
With daytime temperatures of 28°C (82°F) and nighttime lows of 18°C (64°F), September in Washington brings high temperatures during the day. It is also the wettest month of the year, so pack an umbrella.
Rainfall in Washington in September
This month is characterized by heavy rain, often falling intensely. Equip yourself with a poncho to stay protected from the rain. Rain is expected on roughly 11 days, totalling around 181 mm (7.1 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Washington in September
In September, Washington gets high temperatures, with highs of 28°C (82°F). Nights cool to around 18°C (64°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 18°C (64°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.If your ideal day consists of dry skies and pleasant temperatures, April and October typically offer the best circumstances for 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
18°C (64°F)
Max Temperature
28°C (82°F)
Chance of Rain
37%
Precipitation
181 mm (7.1 in)
Rainy days
11 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. Heavy rain is guaranteed, please bring a good poncho and waterproof everything!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.
