Owyhee County, Idaho · Frost dates
Owyhee County frost dates.
First-frost, last-frost, and growing-season length for Owyhee County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: moderate · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-07
- 20%
- 05-01
- 50%
- 04-17
- 80%
- 04-05
- 90%
- 03-31
First fall frost
- 10%
- 10-01
- 20%
- 10-05
- 50%
- 10-17
- 80%
- 10-26
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 04-18
- 20%
- 04-11
- 50%
- 03-30
- 80%
- 03-15
- 90%
- 03-09
First fall freeze
- 10%
- 10-16
- 20%
- 10-21
- 50%
- 10-31
- 80%
- 11-09
- 90%
- 11-17
Growing season length (days, 28°F threshold)
- Short year
- 181
- Median
- 215
- Long year
- 253
Source NOAA station
BRUNEAU, ID US
29.0 mi · 30 yrs of record (1991–2020) · 2530 ft elev.
Nearest qualifying NOAA station is BRUNEAU, ID US, 29 miles away. Local frost dates may vary by 1–2 weeks from these averages.
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