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Frost dates for Bangor, Maine

In a typical year, Bangor’s last spring frost lands around May 4 and the first fall frost around Oct 4, a growing season of about 153 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 Bangor, Maine
OddsLast spring frostFirst fall frost
10 percentApr 24Sep 23
50 percentMay 4Oct 4
90 percentMay 17Oct 21

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 Bangor is typically around 47°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 Bangor, Maine?

Bangor’s last spring frost falls around May 4 in a typical year. One year in ten it is done by April 24, and one year in ten frost holds on until May 17. Frost-sensitive planting usually waits for the late side of that band.

When is the first fall frost in Bangor?

The first fall frost arrives around October 4 in a typical year, as early as September 23 in an early year and as late as October 21 in a late one.

How long is the growing season in Bangor?

About 153 days, counted between the typical last spring frost and the typical first fall frost.

What USDA zone is Bangor in?

Bangor 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.

Nearby cities

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