Matanuska-Susitna Borough, Alaska · Frost dates
Matanuska-Susitna Borough frost dates.
First-frost, last-frost, and growing-season length for Matanuska-Susitna Borough, Alaska. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-28
- 20%
- 05-25
- 50%
- 05-16
- 80%
- 05-09
- 90%
- 05-06
First fall frost
- 10%
- 09-01
- 20%
- 09-07
- 50%
- 09-16
- 80%
- 09-25
- 90%
- 09-29
28°F — killing freeze
Last spring freeze
- 10%
- 05-17
- 20%
- 05-13
- 50%
- 05-05
- 80%
- 04-28
- 90%
- 04-24
First fall freeze
- 10%
- 09-13
- 20%
- 09-19
- 50%
- 09-28
- 80%
- 10-06
- 90%
- 10-12
Growing season length (days, 28°F threshold)
- Short year
- 119
- Median
- 146
- Long year
- 171
Source NOAA station
TALKEETNA AP, AK US
19.4 mi · 30 yrs of record (1991–2020) · 350 ft elev.
Data from TALKEETNA AP, AK US, 19.4 miles away with 30-year NOAA record (1991-2020).
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