Prairie County, Montana · Frost dates
Prairie County frost dates.
First-frost, last-frost, and growing-season length for Prairie County, Montana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-25
- 20%
- 05-20
- 50%
- 05-12
- 80%
- 05-04
- 90%
- 04-30
First fall frost
- 10%
- 09-13
- 20%
- 09-19
- 50%
- 09-28
- 80%
- 10-05
- 90%
- 10-09
28°F — killing freeze
Last spring freeze
- 10%
- 05-15
- 20%
- 05-11
- 50%
- 05-01
- 80%
- 04-23
- 90%
- 04-17
First fall freeze
- 10%
- 09-23
- 20%
- 09-27
- 50%
- 10-05
- 80%
- 10-15
- 90%
- 10-18
Growing season length (days, 28°F threshold)
- Short year
- 131
- Median
- 157
- Long year
- 184
Source NOAA station
TERRY, MT US
9.6 mi · 30 yrs of record (1991–2020) · 2250 ft elev.
Data from TERRY, MT US, 9.6 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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