Johnson County, Wyoming · Frost dates
Johnson County frost dates.
First-frost, last-frost, and growing-season length for Johnson 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%
- 05-28
- 50%
- 05-19
- 80%
- 05-11
- 90%
- 05-07
First fall frost
- 10%
- 09-06
- 20%
- 09-12
- 50%
- 09-21
- 80%
- 09-29
- 90%
- 10-04
28°F — killing freeze
Last spring freeze
- 10%
- 05-23
- 20%
- 05-18
- 50%
- 05-08
- 80%
- 04-30
- 90%
- 04-26
First fall freeze
- 10%
- 09-16
- 20%
- 09-22
- 50%
- 09-30
- 80%
- 10-09
- 90%
- 10-14
Growing season length (days, 28°F threshold)
- Short year
- 116
- Median
- 145
- Long year
- 171
Source NOAA station
BILLY CREEK, WY US
9.0 mi · 30 yrs of record (1991–2020) · 4975 ft elev.
Data from BILLY CREEK, WY US, 9 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
14-day free trial. No credit card. Cancel anytime.