Anchorage Municipality, Alaska · Frost dates
Anchorage Municipality frost dates.
First-frost, last-frost, and growing-season length for Anchorage Municipality, Alaska. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 06-09
- 20%
- 05-29
- 50%
- 05-16
- 80%
- 05-07
- 90%
- 05-02
First fall frost
- 10%
- 09-04
- 20%
- 09-10
- 50%
- 09-20
- 80%
- 09-28
- 90%
- 10-03
28°F — killing freeze
Last spring freeze
- 10%
- 05-15
- 20%
- 05-10
- 50%
- 05-01
- 80%
- 04-21
- 90%
- 04-16
First fall freeze
- 10%
- 09-18
- 20%
- 09-23
- 50%
- 10-01
- 80%
- 10-11
- 90%
- 10-16
Growing season length (days, 28°F threshold)
- Short year
- 126
- Median
- 153
- Long year
- 183
Source NOAA station
EAGLE RVR NATURE CTR, AK US
4.2 mi · 30 yrs of record (1991–2020) · 520 ft elev.
Data from EAGLE RVR NATURE CTR, AK US, 4.2 miles away with 30-year NOAA record (1991-2020).
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