Nez Perce County, Idaho · Frost dates
Nez Perce County frost dates.
First-frost, last-frost, and growing-season length for Nez Perce County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 06-19
- 20%
- 06-06
- 50%
- 05-23
- 80%
- 05-10
- 90%
- 05-04
First fall frost
- 10%
- 09-07
- 20%
- 09-12
- 50%
- 09-25
- 80%
- 10-04
- 90%
- 10-10
28°F — killing freeze
Last spring freeze
- 10%
- 05-24
- 20%
- 05-14
- 50%
- 05-02
- 80%
- 04-21
- 90%
- 04-13
First fall freeze
- 10%
- 09-21
- 20%
- 09-29
- 50%
- 10-09
- 80%
- 10-21
- 90%
- 10-28
Growing season length (days, 28°F threshold)
- Short year
- 120
- Median
- 160
- Long year
- 198
Source NOAA station
WINCHESTER, ID US
9.3 mi · 30 yrs of record (1991–2020) · 3972 ft elev.
Data from WINCHESTER, ID US, 9.3 miles away with 30-year NOAA record (1991-2020).
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