Denali Borough, Alaska · Frost dates
Denali Borough frost dates.
First-frost, last-frost, and growing-season length for Denali Borough, Alaska. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: moderate · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 06-03
- 20%
- 05-31
- 50%
- 05-25
- 80%
- 05-17
- 90%
- 05-13
First fall frost
- 10%
- 08-26
- 20%
- 08-31
- 50%
- 09-08
- 80%
- 09-16
- 90%
- 09-20
28°F — killing freeze
Last spring freeze
- 10%
- 05-24
- 20%
- 05-20
- 50%
- 05-13
- 80%
- 05-06
- 90%
- 05-03
First fall freeze
- 10%
- 09-05
- 20%
- 09-10
- 50%
- 09-19
- 80%
- 09-26
- 90%
- 09-29
Growing season length (days, 28°F threshold)
- Short year
- 104
- Median
- 129
- Long year
- 149
Source NOAA station
DENALI 27 N, AK US
30.5 mi · 30 yrs of record (1991–2020) · 2225 ft elev.
Nearest qualifying NOAA station is DENALI 27 N, AK US, 30.5 miles away. Local frost dates may vary by 1–2 weeks from these averages.
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