Toole County, Montana · Frost dates
Toole County frost dates.
First-frost, last-frost, and growing-season length for Toole County, Montana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 06-06
- 20%
- 06-01
- 50%
- 05-23
- 80%
- 05-14
- 90%
- 05-11
First fall frost
- 10%
- 09-03
- 20%
- 09-07
- 50%
- 09-16
- 80%
- 09-24
- 90%
- 09-28
28°F — killing freeze
Last spring freeze
- 10%
- 05-22
- 20%
- 05-18
- 50%
- 05-10
- 80%
- 05-02
- 90%
- 04-30
First fall freeze
- 10%
- 09-13
- 20%
- 09-17
- 50%
- 09-26
- 80%
- 10-03
- 90%
- 10-07
Growing season length (days, 28°F threshold)
- Short year
- 114
- Median
- 139
- Long year
- 160
Source NOAA station
SHELBY, MT US
10.7 mi · 30 yrs of record (1991–2020) · 3325 ft elev.
Data from SHELBY, MT US, 10.7 miles away with 30-year NOAA record (1991-2020).
Bield Farm earns its predictions.
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