Carbon County, Montana · Frost dates
Carbon County frost dates.
First-frost, last-frost, and growing-season length for Carbon County, Montana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-30
- 20%
- 05-23
- 50%
- 05-14
- 80%
- 05-05
- 90%
- 05-02
First fall frost
- 10%
- 09-07
- 20%
- 09-13
- 50%
- 09-24
- 80%
- 10-02
- 90%
- 10-07
28°F — killing freeze
Last spring freeze
- 10%
- 05-13
- 20%
- 05-09
- 50%
- 05-01
- 80%
- 04-23
- 90%
- 04-19
First fall freeze
- 10%
- 09-20
- 20%
- 09-26
- 50%
- 10-04
- 80%
- 10-14
- 90%
- 10-19
Growing season length (days, 28°F threshold)
- Short year
- 130
- Median
- 156
- Long year
- 183
Source NOAA station
BRIDGER 2 N, MT US
9.1 mi · 30 yrs of record (1991–2020) · 3583 ft elev.
Data from BRIDGER 2 N, MT US, 9.1 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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