Walla Walla (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Walla Walla.
Climate overview of Walla Walla
Temperatures in Walla Walla, Washington State, United States of America, vary greatly throughout the year. July is the hottest month at 33°C (91°F), while December is the coldest at 5°C (41°F).
The city tends toward dry conditions, with around 477 mm (19 in) of rain/snowfall per year. It does, however, have a distinct dry season from June to September.
Walla Walla Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Walla Walla — and find the best time to visit.
Monthly Temperature in Walla Walla
The climate in Walla Walla is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 33°C (91°F) in July to a chilly 5°C (41°F) in the coolest month, December.
Nights vary from 17°C (63°F) in July to around -2°C (28°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Walla Walla
Walla Walla has a relatively dry climate with low precipitation, averaging 477 mm (19 in) of rain/snowfall annually. The climate in Walla Walla shows significant variation throughout the year. Expect moderate rainfall in March, the wettest month, with an average of 69 mm (2.7 in) of precipitation over 17 rainy days.
In contrast, the driest month July offers drier and sunnier days, with around 7.7 mm (0.3 in) of rainfall over 3 rainy days. For more details, please visit our Walla Walla Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Walla Walla
Frequently asked questions about the climate in Walla Walla
What is the best time to visit Walla Walla?
May, June and September typically offer the most optimal weather in Walla Walla. In contrast, January, February, November and December tend to have less optimal conditions. Walla Walla has a distinct dry season from June to September.
What temperatures can I expect in Walla Walla?
Daytime highs range from 5°C (41°F) in December to 33°C (91°F) in July. Nighttime lows range from -2°C (28°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Walla Walla get?
Annual rainfall is around 477 mm (19 in). March is the wettest month with 69 mm (2.7 in), while July is the driest with 7.7 mm (0.3 in).
Walla Walla 3-Day Forecast
Walla Walla (WA) 3-Day Forecast
Walla Walla on the map
Walla Walla is highlighted — select any city to see its climate.
Popular this month
Where to go in July — 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
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
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.