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
September in Washington brings very high temperatures, with daytime highs of 34°C (93°F) and nights around 18°C (64°F). Expect around 26 mm (1 in) of rainfall during the month.
Rainfall in Washington in September
You can expect rain on around 4 days based on historical patterns, with 26 mm (1 in) average for the month. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.
Temperature in Washington in September
In September, expect very high temperatures in Washington, with highs of 34°C (93°F) and lows of 18°C (64°F) at night. Indoor breaks or shaded spots can make the warmer part of the day much more comfortable. Nights cool down to 18°C (64°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 looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Washington. Our weather planner can help you explore destinations with more pleasant weather conditions.
Washington Temperature in September
Min Temperature
18°C (64°F)
Max Temperature
34°C (93°F)
Chance of Rain
14%
Precipitation
26 mm (1 in)
Rainy days
4 days
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
Hot weather in September means keeping cool is the priority. Loose-fitting clothes in natural fabrics work best. Pack plenty of shorts, tank tops, and breathable shirts. Don't forget a hat, swimwear, and comfortable sandals. Pack a light rain jacket or compact umbrella for occasional showers.
What To Do in Washington in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Cycling8/10 -
Walking8/10 -
Camping10/10 -
Outdoor sports8/10
Washington 3-Day Forecast
More climate data for Washington
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
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.