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Frost dates for Macomb, Illinois

In a typical year, Macomb’s last spring frost lands around Apr 17 and the first fall frost around Oct 22, a growing season of about 188 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 6a.

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

Last spring frost and first fall frost odds for Macomb, Illinois
OddsLast spring frostFirst fall frost
10 percentApr 4Oct 7
50 percentApr 17Oct 22
90 percentMay 2Nov 1

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 Macomb is typically around 53°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 Macomb, Illinois?

Macomb’s last spring frost falls around April 17 in a typical year. One year in ten it is done by April 4, and one year in ten frost holds on until May 2. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Macomb?

The first fall frost arrives around October 22 in a typical year, as early as October 7 in an early year and as late as November 1 in a late one.

How long is the growing season in Macomb?

About 188 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Macomb in?

Macomb is in USDA hardiness zone 6a 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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