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Frost dates for River Falls, Wisconsin

In a typical year, River Falls’s last spring frost lands around May 11 and the first fall frost around Oct 1, a growing season of about 143 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 4b.

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

Last spring frost and first fall frost odds for River Falls, Wisconsin
OddsLast spring frostFirst fall frost
10 percentApr 26Sep 19
50 percentMay 11Oct 1
90 percentMay 26Oct 15

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 River Falls is typically around 45°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 River Falls, Wisconsin?

River Falls’s last spring frost falls around May 11 in a typical year. One year in ten it is done by April 26, and one year in ten frost holds on until May 26. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in River Falls?

The first fall frost arrives around October 1 in a typical year, as early as September 19 in an early year and as late as October 15 in a late one.

How long is the growing season in River Falls?

About 143 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is River Falls in?

River Falls is in USDA hardiness zone 4b 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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