30-year climate normals

Spokane County Climate and Weather Averages

Hottest month — July

87.1°

average daily high. The coldest month is December, averaging a low of 25.7°F.

Spokane County gets 17.36" of precipitation a year, and 36% of it falls in Nov, Dec, Jan.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

Month	Avg high	Avg low	Precip
January	37.8°	25.8°	2.00"
February	42.5°	26.7°	1.32"
March	51.3°	31.7°	1.82"
April	59.6°	36.6°	1.50"
May	69.7°	44.1°	1.70"
June	75.8°	50.4°	1.48"
July	87.1°	56.0°	0.67"
August	86.2°	54.5°	0.54"
September	76.0°	46.8°	0.68"
October	60.3°	38.0°	1.46"
November	45.1°	30.7°	2.01"
December	36.9°	25.7°	2.18"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 36% falling in the wettest three months (Nov, Dec, Jan).

January 2.00"

February 1.32"

March 1.82"

April 1.50"

May 1.70"

June 1.48"

July 0.67"

August 0.54"

September 0.68"

October 1.46"

November 2.01"

December 2.18"

Annual total 17.36"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 507

Heating degree days How much heating the climate demands 6,019

Approximate annual cooling cost At 14.95¢/kWh, Washington average $76

Approximate annual electric heating cost Lower where heating is gas rather than electric $315

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Spokane County, where electricity is one line of eight.

Common questions

What is the weather like in Spokane County?

Spokane County averages a high of 87.1°F in July and a low of 25.7°F in December. Annual precipitation is 17.36 inches, with essentially no snow.

When is the rainy season in Spokane County?

The wettest stretch is Nov, Dec, Jan, which accounts for 36% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Spokane County?

The average daily high in July, the hottest month, is 87.1°F. That drives 507 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Spokane County?

Effectively no. Measurable snowfall is rare in Spokane County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station SPOKANE FELTS FLD, WA US (USW00094176), 5.8 miles from the county centroid.
Heating and cooling degree days — NOAA, same station and period.
Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, Washington residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.