Kenai Peninsula Borough, Alaska · Frost dates
Kenai Peninsula Borough frost dates.
First-frost, last-frost, and growing-season length for Kenai Peninsula Borough, Alaska. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: moderate · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-25
- 20%
- 05-18
- 50%
- 05-07
- 80%
- 04-28
- 90%
- 04-21
First fall frost
- 10%
- 09-20
- 20%
- 09-27
- 50%
- 10-07
- 80%
- 10-18
- 90%
- 10-22
28°F — killing freeze
Last spring freeze
- 10%
- 05-09
- 20%
- 05-04
- 50%
- 04-23
- 80%
- 04-12
- 90%
- 04-08
First fall freeze
- 10%
- 10-01
- 20%
- 10-07
- 50%
- 10-19
- 80%
- 10-27
- 90%
- 11-01
Growing season length (days, 28°F threshold)
- Short year
- 145
- Median
- 179
- Long year
- 207
Source NOAA station
BIG RIVER LAKES, AK US
30.9 mi · 30 yrs of record (1991–2020) · 60 ft elev.
Nearest qualifying NOAA station is BIG RIVER LAKES, AK US, 30.9 miles away. Local frost dates may vary by 1–2 weeks from these averages.
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