Lewis County, Idaho · Frost dates
Lewis County frost dates.
First-frost, last-frost, and growing-season length for Lewis 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%
- 06-10
- 50%
- 05-24
- 80%
- 05-12
- 90%
- 05-06
First fall frost
- 10%
- 09-01
- 20%
- 09-07
- 50%
- 09-20
- 80%
- 09-30
- 90%
- 10-05
28°F — killing freeze
Last spring freeze
- 10%
- 05-25
- 20%
- 05-17
- 50%
- 05-05
- 80%
- 04-26
- 90%
- 04-19
First fall freeze
- 10%
- 09-13
- 20%
- 09-21
- 50%
- 10-02
- 80%
- 10-13
- 90%
- 10-19
Growing season length (days, 28°F threshold)
- Short year
- 111
- Median
- 150
- Long year
- 183
Source NOAA station
NEZPERCE, ID US
8.6 mi · 30 yrs of record (1991–2020) · 3248 ft elev.
Data from NEZPERCE, ID US, 8.6 miles away with 30-year NOAA record (1991-2020).
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