Valley County, Idaho · Frost dates
Valley County frost dates.
First-frost, last-frost, and growing-season length for Valley County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 07-05
- 20%
- 06-28
- 50%
- 06-12
- 80%
- 05-28
- 90%
- 05-21
First fall frost
- 10%
- 08-26
- 20%
- 09-01
- 50%
- 09-11
- 80%
- 09-19
- 90%
- 09-23
28°F — killing freeze
Last spring freeze
- 10%
- 06-07
- 20%
- 05-30
- 50%
- 05-16
- 80%
- 05-07
- 90%
- 05-02
First fall freeze
- 10%
- 09-08
- 20%
- 09-14
- 50%
- 09-24
- 80%
- 10-03
- 90%
- 10-10
Growing season length (days, 28°F threshold)
- Short year
- 93
- Median
- 131
- Long year
- 161
Source NOAA station
YELLOWPINE, ID US
9.5 mi · 30 yrs of record (1991–2020) · 5050 ft elev.
Data from YELLOWPINE, ID US, 9.5 miles away with 30-year NOAA record (1991-2020).
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