Fremont County, Wyoming · Frost dates
Fremont County frost dates.
First-frost, last-frost, and growing-season length for Fremont County, Wyoming. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-31
- 20%
- 05-26
- 50%
- 05-16
- 80%
- 05-06
- 90%
- 05-01
First fall frost
- 10%
- 09-15
- 20%
- 09-20
- 50%
- 09-28
- 80%
- 10-06
- 90%
- 10-12
28°F — killing freeze
Last spring freeze
- 10%
- 05-19
- 20%
- 05-13
- 50%
- 05-03
- 80%
- 04-24
- 90%
- 04-20
First fall freeze
- 10%
- 09-24
- 20%
- 09-28
- 50%
- 10-07
- 80%
- 10-16
- 90%
- 10-19
Growing season length (days, 28°F threshold)
- Short year
- 128
- Median
- 157
- Long year
- 182
Source NOAA station
RIVERTON, WY US
6.7 mi · 30 yrs of record (1991–2020) · 5568 ft elev.
Data from RIVERTON, WY US, 6.7 miles away with 30-year NOAA record (1991-2020).
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