Skip to content

Frost dates for Belleville, Illinois

In a typical year, Belleville’s last spring frost lands around Apr 12 and the first fall frost around Oct 20, a growing season of about 191 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 Belleville, Illinois
OddsLast spring frostFirst fall frost
10 percentMar 28Oct 3
50 percentApr 12Oct 20
90 percentApr 28Nov 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 Belleville is typically around 58°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 Belleville, Illinois?

Belleville’s last spring frost falls around April 12 in a typical year. One year in ten it is done by March 28, and one year in ten frost holds on until April 28. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Belleville?

The first fall frost arrives around October 20 in a typical year, as early as October 3 in an early year and as late as November 1 in a late one.

How long is the growing season in Belleville?

About 191 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Belleville in?

Belleville 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

Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.

Set up your garden