Garfield County, Montana · Frost dates
Garfield County frost dates.
First-frost, last-frost, and growing-season length for Garfield County, Montana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-31
- 20%
- 05-27
- 50%
- 05-18
- 80%
- 05-11
- 90%
- 05-06
First fall frost
- 10%
- 09-08
- 20%
- 09-13
- 50%
- 09-20
- 80%
- 09-28
- 90%
- 10-01
28°F — killing freeze
Last spring freeze
- 10%
- 05-21
- 20%
- 05-17
- 50%
- 05-08
- 80%
- 04-29
- 90%
- 04-24
First fall freeze
- 10%
- 09-17
- 20%
- 09-21
- 50%
- 09-29
- 80%
- 10-07
- 90%
- 10-11
Growing season length (days, 28°F threshold)
- Short year
- 119
- Median
- 144
- Long year
- 170
Source NOAA station
JORDAN AP, MT US
4.6 mi · 30 yrs of record (1991–2020) · 2662 ft elev.
Data from JORDAN AP, MT US, 4.6 miles away with 30-year NOAA record (1991-2020).
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