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 (1991–2020) · 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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