Wrangell City and Borough, Alaska · Frost dates
Wrangell City and Borough frost dates.
First-frost, last-frost, and growing-season length for Wrangell City and Borough, Alaska. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 04-29
- 20%
- 04-23
- 50%
- 04-11
- 80%
- 03-31
- 90%
- 03-26
First fall frost
- 10%
- 10-13
- 20%
- 10-20
- 50%
- 11-01
- 80%
- 11-13
- 90%
- 11-19
28°F — killing freeze
Last spring freeze
- 10%
- 04-09
- 20%
- 04-03
- 50%
- 03-24
- 80%
- 03-11
- 90%
- 03-04
First fall freeze
- 10%
- 10-31
- 20%
- 11-07
- 50%
- 11-18
- 80%
- 11-30
- 90%
- 12-07
Growing season length (days, 28°F threshold)
- Short year
- 205
- Median
- 239
- Long year
- 278
Source NOAA station
WRANGELL AP, AK US
24.5 mi · 30 yrs of record (1991–2020) · 56 ft elev.
Data from WRANGELL AP, AK US, 24.5 miles away with 30-year NOAA record (1991-2020).
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