Spokane Valley (WA) Weather & Climate: Best Time to Visit

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

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

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

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