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Frost dates for Lewiston, Maine

In a typical year, Lewiston’s last spring frost lands around May 1 and the first fall frost around Oct 10, a growing season of about 162 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 5b.

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

Last spring frost and first fall frost odds for Lewiston, Maine
OddsLast spring frostFirst fall frost
10 percentApr 19Sep 29
50 percentMay 1Oct 10
90 percentMay 13Oct 27

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 Lewiston is typically around 47°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 Lewiston, Maine?

Lewiston’s last spring frost falls around May 1 in a typical year. One year in ten it is done by April 19, and one year in ten frost holds on until May 13. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Lewiston?

The first fall frost arrives around October 10 in a typical year, as early as September 29 in an early year and as late as October 27 in a late one.

How long is the growing season in Lewiston?

About 162 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Lewiston in?

Lewiston is in USDA hardiness zone 5b 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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