Fremont County, Idaho · Frost dates
Fremont County frost dates.
First-frost, last-frost, and growing-season length for Fremont County, Idaho. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5b
32°F — light freeze
Last spring frost
- 10%
- 06-13
- 20%
- 06-07
- 50%
- 05-21
- 80%
- 05-09
- 90%
- 05-04
First fall frost
- 10%
- 09-04
- 20%
- 09-09
- 50%
- 09-21
- 80%
- 10-03
- 90%
- 10-07
28°F — killing freeze
Last spring freeze
- 10%
- 05-26
- 20%
- 05-15
- 50%
- 05-03
- 80%
- 04-21
- 90%
- 04-16
First fall freeze
- 10%
- 09-13
- 20%
- 09-22
- 50%
- 10-04
- 80%
- 10-15
- 90%
- 10-20
Growing season length (days, 28°F threshold)
- Short year
- 110
- Median
- 154
- Long year
- 187
Source NOAA station
ASHTON 1N, ID US
10.3 mi · 30 yrs of record (1991–2020) · 5212 ft elev.
Data from ASHTON 1N, ID US, 10.3 miles away with 30-year NOAA record (1991-2020).
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