Penobscot County, Maine · Frost dates

Penobscot County frost dates.

First-frost, last-frost, and growing-season length for Penobscot County, Maine. Sourced from NOAA 1991-2020 Climate Normals.

Data confidence: high · USDA zone: 5a

32°F — light freeze

Last spring frost

10%
05-16
20%
05-11
50%
05-04
80%
04-28
90%
04-25

First fall frost

10%
09-24
20%
09-29
50%
10-06
80%
10-16
90%
10-20

28°F — killing freeze

Last spring freeze

10%
05-04
20%
05-01
50%
04-24
80%
04-17
90%
04-13

First fall freeze

10%
10-02
20%
10-08
50%
10-18
80%
10-29
90%
11-02

Growing season length (days, 28°F threshold)

Short year
151
Median
177
Long year
203

Source NOAA station

LINCOLN SANITARY DISTRICT/WTP, ME US

8.0 mi · 30 yrs of record (19912020) · 190 ft elev.

Data from LINCOLN SANITARY DISTRICT/WTP, ME US, 8 miles away with 30-year NOAA record (1991-2020).

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