Spokane Valley Weather by Month

Average temperatures, rainfall and humidity for Spokane Valley, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Spokane Valley month looks like before you travel — then check the live Spokane Valley forecast for the days ahead.

Warmest month

July

32°C average high

Coolest month

January

-3°C average low

Wettest month

November

58 mm of rain

Driest month

July

10 mm of rain

Average temperature and rainfall in Spokane Valley by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	2°C	-3°C	-23°C / 12°C	42 mm	86%	9 km/h
February	5°C	-3°C	-19°C / 15°C	28 mm	77%	12 km/h
March	11°C	0°C	-15°C / 25°C	41 mm	69%	13 km/h
April	15°C	3°C	-5°C / 29°C	39 mm	59%	13 km/h
May	22°C	8°C	-3°C / 33°C	37 mm	56%	12 km/h
June	26°C	11°C	3°C / 43°C	32 mm	50%	12 km/h
July	32°C	15°C	7°C / 42°C	10 mm	40%	11 km/h
August	31°C	14°C	7°C / 40°C	20 mm	43%	10 km/h
September	25°C	10°C	0°C / 39°C	30 mm	54%	11 km/h
October	16°C	4°C	-11°C / 28°C	46 mm	68%	11 km/h
November	7°C	0°C	-18°C / 17°C	58 mm	82%	11 km/h
December	2°C	-3°C	-30°C / 16°C	45 mm	84%	10 km/h

Best time to visit Spokane Valley

The most comfortable time to visit Spokane Valley is generally May to June and September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around November, totalling about 427 mm a year.

Travellers who prefer heat should aim for July, when highs average 32°C. November is the month to avoid if rain would spoil your plans — it averages 58 mm, roughly 6× the rainfall of the driest month (July).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Spokane Valley forecast for what is happening now.