Kootenai County, Idaho · Frost dates
Kootenai County frost dates.
First-frost, last-frost, and growing-season length for Kootenai County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-06
- 20%
- 05-02
- 50%
- 04-22
- 80%
- 04-10
- 90%
- 04-04
First fall frost
- 10%
- 10-04
- 20%
- 10-08
- 50%
- 10-18
- 80%
- 10-30
- 90%
- 11-05
28°F — killing freeze
Last spring freeze
- 10%
- 04-21
- 20%
- 04-13
- 50%
- 04-01
- 80%
- 03-20
- 90%
- 03-13
First fall freeze
- 10%
- 10-15
- 20%
- 10-21
- 50%
- 11-01
- 80%
- 11-12
- 90%
- 11-20
Growing season length (days, 28°F threshold)
- Short year
- 177
- Median
- 214
- Long year
- 252
Source NOAA station
COEUR D'ALENE, ID US
4.7 mi · 30 yrs of record (1991–2020) · 2133 ft elev.
Data from COEUR D'ALENE, ID US, 4.7 miles away with 30-year NOAA record (1991-2020).
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