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Frost dates for Evanston, Wyoming

In a typical year, Evanston’s last spring frost lands around Jun 12 and the first fall frost around Sep 12, a growing season of about 92 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 5a.

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

Last spring frost and first fall frost odds for Evanston, Wyoming
OddsLast spring frostFirst fall frost
10 percentMay 26Aug 26
50 percentJun 12Sep 12
90 percentJul 2Sep 25

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 Evanston is typically around 43°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 Evanston, Wyoming?

Evanston’s last spring frost falls around June 12 in a typical year. One year in ten it is done by May 26, and one year in ten frost holds on until July 2. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Evanston?

The first fall frost arrives around September 12 in a typical year, as early as August 26 in an early year and as late as September 25 in a late one.

How long is the growing season in Evanston?

About 92 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Evanston in?

Evanston is in USDA hardiness zone 5a 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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