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Frost dates for Spokane, Washington

In a typical year, Spokane’s last spring frost lands around Apr 26 and the first fall frost around Oct 12, a growing season of about 169 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 7a.

Right now the typical frost season has arrived; planting waits for spring.

Last spring frost and first fall frost odds for Spokane, Washington
OddsLast spring frostFirst fall frost
10 percentApr 9Sep 29
50 percentApr 26Oct 12
90 percentMay 10Oct 28

A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.

Soil in Spokane is typically around 46°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.

See what is plantable in your ZIP with the what-to-plant lookup.

Common questions

When is the last frost in Spokane, Washington?

Spokane’s last spring frost falls around April 26 in a typical year. One year in ten it is done by April 9, and one year in ten frost holds on until May 10. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Spokane?

The first fall frost arrives around October 12 in a typical year, as early as September 29 in an early year and as late as October 28 in a late one.

How long is the growing season in Spokane?

About 169 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Spokane in?

Spokane is in USDA hardiness zone 7a under the 2023 USDA Plant Hardiness Zone Map.

Dates come from 30-year NOAA climate normals for the nearest reporting station. They describe odds, not a forecast.

Nearby cities

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