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Frost dates for Coeur d'Alene, Idaho

In a typical year, Coeur d'Alene’s last spring frost lands around Apr 22 and the first fall frost around Oct 18, a growing season of about 179 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 6b.

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

Last spring frost and first fall frost odds for Coeur d'Alene, Idaho
OddsLast spring frostFirst fall frost
10 percentApr 4Oct 4
50 percentApr 22Oct 18
90 percentMay 6Nov 5

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 Coeur d'Alene is typically around 47°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.

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Common questions

When is the last frost in Coeur d'Alene, Idaho?

Coeur d'Alene’s last spring frost falls around April 22 in a typical year. One year in ten it is done by April 4, and one year in ten frost holds on until May 6. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Coeur d'Alene?

The first fall frost arrives around October 18 in a typical year, as early as October 4 in an early year and as late as November 5 in a late one.

How long is the growing season in Coeur d'Alene?

About 179 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Coeur d'Alene in?

Coeur d'Alene is in USDA hardiness zone 6b 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.

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