Weston County, Wyoming · Frost dates
Weston County frost dates.
First-frost, last-frost, and growing-season length for Weston County, Wyoming. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 06-04
- 20%
- 05-31
- 50%
- 05-20
- 80%
- 05-12
- 90%
- 05-08
First fall frost
- 10%
- 09-07
- 20%
- 09-13
- 50%
- 09-23
- 80%
- 10-01
- 90%
- 10-05
28°F — killing freeze
Last spring freeze
- 10%
- 05-24
- 20%
- 05-19
- 50%
- 05-09
- 80%
- 05-01
- 90%
- 04-26
First fall freeze
- 10%
- 09-16
- 20%
- 09-22
- 50%
- 10-02
- 80%
- 10-12
- 90%
- 10-15
Growing season length (days, 28°F threshold)
- Short year
- 115
- Median
- 146
- Long year
- 172
Source NOAA station
UPTON, WY US
17.2 mi · 30 yrs of record (1991–2020) · 4320 ft elev.
Data from UPTON, WY US, 17.2 miles away with 30-year NOAA record (1991-2020).
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