Spokane Valley (WA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Spokane Valley.
Climate overview of Spokane Valley
Temperatures in Spokane Valley, Washington State, United States of America, vary greatly throughout the year. July is the hottest month at 30°C (86°F), while December is the coldest at 2°C (36°F).
The city tends toward dry conditions, with around 469 mm (18 in) of rain/snowfall per year. It does, however, have two distinct dry seasons, April to May and July to October, with very warm summers and cold winters. The most sunshine falls in July, with an average of 12.8 hours of daily sunshine.
Spokane Valley Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Spokane Valley - and find the best time to visit.
Monthly Temperature in Spokane Valley
The climate in Spokane Valley is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 30°C (86°F) in July to a chilly 2°C (36°F) in the coolest month, December.
Nights vary from 13°C (55°F) in July to around -4°C (25°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Spokane Valley
With annual rain/snowfall averaging 469 mm (18 in), Spokane Valley maintains relatively low precipitation levels throughout the seasons. The climate in Spokane Valley shows significant variation throughout the year. Expect moderate snow/rainfall in December, the wettest month, with an average of 65 mm (2.6 in) of precipitation over 15 snowy/rainy days.
In contrast, the driest month August offers drier and sunnier days, with around 12 mm (0.5 in) of rainfall over 5 rainy days. For more details, please visit our Spokane Valley Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Spokane Valley
For those who appreciate different seasons, Spokane Valley serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 12.8 hours of sunshine daily, and embrace the darker days in December, offering only 2.0 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Spokane Valley by Month
The relative humidity is high throughout the year in Spokane Valley.
The city experiences its highest humidity in December, reaching 86%. In July, the humidity drops to its lowest level at 44%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Spokane Valley
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June and September
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Seasonal pattern: Two distinct dry seasons, April to May and July to October, with very warm summers and cold winters
- Coldest conditions: December, with freezing nights around -4°C (25°F).
Frequently asked questions about the climate in Spokane Valley
What is the best time to visit Spokane Valley?
May, June and September typically offer the most optimal weather in Spokane Valley. In contrast, January, March, November and December tend to have less optimal conditions. Spokane Valley has two distinct dry seasons, April to May and July to October, with very warm summers and cold winters.
What temperatures can I expect in Spokane Valley?
Daytime highs range from 2°C (36°F) in December to 30°C (86°F) in July. Nighttime lows range from -4°C (25°F) to 13°C (55°F). Temperatures vary considerably through the year.
How much rain does Spokane Valley get?
Annual rainfall is around 469 mm (18 in). December is the wettest month with 65 mm (2.6 in), while August is the driest with 12 mm (0.5 in). In the coldest months, precipitation may fall as snow/rain.
How sunny is Spokane Valley?
Spokane Valley receives around 2,579 hours of sunshine per year. July is the sunniest month with 383 hours, while December is the cloudiest with just 60 hours. Overall, Spokane Valley enjoys abundant sunshine.
Spokane Valley 3-Day Forecast
Spokane Valley (WA) 3-Day Forecast
Spokane Valley on the map
Spokane Valley is highlighted - select any city to see its climate.
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