Bethel Census Area, Alaska · Frost dates
Bethel Census Area frost dates.
First-frost, last-frost, and growing-season length for Bethel Census Area, Alaska. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: low · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 06-02
- 20%
- 05-31
- 50%
- 05-21
- 80%
- 05-12
- 90%
- 05-08
First fall frost
- 10%
- 09-07
- 20%
- 09-12
- 50%
- 09-22
- 80%
- 09-30
- 90%
- 10-04
28°F — killing freeze
Last spring freeze
- 10%
- 05-26
- 20%
- 05-21
- 50%
- 05-11
- 80%
- 05-03
- 90%
- 04-30
First fall freeze
- 10%
- 09-19
- 20%
- 09-24
- 50%
- 10-01
- 80%
- 10-10
- 90%
- 10-15
Growing season length (days, 28°F threshold)
- Short year
- 116
- Median
- 143
- Long year
- 168
Source NOAA station
BETHEL AP, AK US
57.3 mi · 30 yrs of record (1991–2020) · 102 ft elev.
No NOAA station within 50 miles meets the long-record threshold. Estimated from BETHEL AP, AK US, 57.3 miles away. Consult your state extension service for local frost dates.
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