Power County, Idaho · Frost dates
Power County frost dates.
First-frost, last-frost, and growing-season length for Power County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 05-21
- 20%
- 05-15
- 50%
- 05-04
- 80%
- 04-25
- 90%
- 04-20
First fall frost
- 10%
- 09-22
- 20%
- 09-29
- 50%
- 10-08
- 80%
- 10-19
- 90%
- 10-24
28°F — killing freeze
Last spring freeze
- 10%
- 05-06
- 20%
- 05-01
- 50%
- 04-19
- 80%
- 04-08
- 90%
- 04-03
First fall freeze
- 10%
- 10-05
- 20%
- 10-11
- 50%
- 10-21
- 80%
- 10-31
- 90%
- 11-05
Growing season length (days, 28°F threshold)
- Short year
- 152
- Median
- 185
- Long year
- 216
Source NOAA station
AMERICAN FALLS, ID US
7.5 mi · 30 yrs of record (1991–2020) · 4510 ft elev.
Data from AMERICAN FALLS, ID US, 7.5 miles away with 30-year NOAA record (1991-2020).
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