Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Washington Weather in September
With daytime temperatures of 24°C (75°F) and nighttime lows of 11°C (52°F), September in Washington brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 75 mm (3 in) falls on average.
Rainfall in Washington in September
Records from the past 30 years suggest around 11 days of rain, with 75 mm (3 in) average for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Washington in September
September in Washington is generally excellent, with days reaching 24°C (75°F) and nights settling around 11°C (52°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows of 11°C (52°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Washington in September
The city usually sees around 197 hours of sunlight, indicating many sunny days , a great month for sightseeing.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Washington Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
24°C (75°F)
Chance of Rain
37%
Precipitation
75 mm (3 in)
Rainy days
11 days
Humidity
72% *
Sunshine
197 hours *
Percentage Sunshine
53% *
* Data from: Pittsburgh, the United States of America (36 KM, 22 Miles).
Washington Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Washington - and find the best time to visit.
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
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Washington in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Washington in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling9/10 -
Walking9/10 -
Camping8/10 -
Outdoor sports9/10
Washington 3-Day Forecast
More climate data for Washington
Temperature Rainfall Sunshine Humidity
See the full Washington climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
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