Fairbanks North Star Borough, Alaska · Frost dates
Fairbanks North Star Borough frost dates.
First-frost, last-frost, and growing-season length for Fairbanks North Star Borough, Alaska. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 06-03
- 20%
- 05-29
- 50%
- 05-20
- 80%
- 05-13
- 90%
- 05-10
First fall frost
- 10%
- 08-20
- 20%
- 08-25
- 50%
- 09-01
- 80%
- 09-10
- 90%
- 09-16
28°F — killing freeze
Last spring freeze
- 10%
- 05-25
- 20%
- 05-18
- 50%
- 05-10
- 80%
- 05-03
- 90%
- 05-01
First fall freeze
- 10%
- 09-01
- 20%
- 09-04
- 50%
- 09-14
- 80%
- 09-23
- 90%
- 09-27
Growing season length (days, 28°F threshold)
- Short year
- 99
- Median
- 127
- Long year
- 149
Source NOAA station
EIELSON FLD, AK US
17.9 mi · 30 yrs of record (1991–2020) · 547 ft elev.
Data from EIELSON FLD, AK US, 17.9 miles away with 30-year NOAA record (1991-2020).
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