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Frost dates for Carbondale, Illinois

In a typical year, Carbondale’s last spring frost lands around Apr 9 and the first fall frost around Oct 22, a growing season of about 196 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 Carbondale, Illinois
OddsLast spring frostFirst fall frost
10 percentMar 25Oct 10
50 percentApr 9Oct 22
90 percentApr 25Nov 2

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 Carbondale is typically around 55°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 Carbondale, Illinois?

Carbondale’s last spring frost falls around April 9 in a typical year. One year in ten it is done by March 25, and one year in ten frost holds on until April 25. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Carbondale?

The first fall frost arrives around October 22 in a typical year, as early as October 10 in an early year and as late as November 2 in a late one.

How long is the growing season in Carbondale?

About 196 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Carbondale in?

Carbondale 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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