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Frost dates for Worthington, Minnesota

In a typical year, Worthington’s last spring frost lands around May 3 and the first fall frost around Oct 4, a growing season of about 154 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 Worthington, Minnesota
OddsLast spring frostFirst fall frost
10 percentApr 19Sep 21
50 percentMay 3Oct 4
90 percentMay 15Oct 18

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 Worthington is typically around 46°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 Worthington, Minnesota?

Worthington’s last spring frost falls around May 3 in a typical year. One year in ten it is done by April 19, and one year in ten frost holds on until May 15. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Worthington?

The first fall frost arrives around October 4 in a typical year, as early as September 21 in an early year and as late as October 18 in a late one.

How long is the growing season in Worthington?

About 154 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Worthington in?

Worthington 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.

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