Hill County, Montana · Frost dates
Hill County frost dates.
First-frost, last-frost, and growing-season length for Hill County, Montana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 06-07
- 20%
- 06-02
- 50%
- 05-24
- 80%
- 05-16
- 90%
- 05-12
First fall frost
- 10%
- 08-29
- 20%
- 09-04
- 50%
- 09-15
- 80%
- 09-24
- 90%
- 09-28
28°F — killing freeze
Last spring freeze
- 10%
- 05-27
- 20%
- 05-21
- 50%
- 05-12
- 80%
- 05-03
- 90%
- 04-29
First fall freeze
- 10%
- 09-12
- 20%
- 09-17
- 50%
- 09-26
- 80%
- 10-03
- 90%
- 10-06
Growing season length (days, 28°F threshold)
- Short year
- 108
- Median
- 137
- Long year
- 160
Source NOAA station
GILDFORD, MT US
10.1 mi · 30 yrs of record (1991–2020) · 2820 ft elev.
Data from GILDFORD, MT US, 10.1 miles away with 30-year NOAA record (1991-2020).
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