Pondera County, Montana · Frost dates
Pondera County frost dates.
First-frost, last-frost, and growing-season length for Pondera 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%
- 05-26
- 50%
- 05-17
- 80%
- 05-07
- 90%
- 05-03
First fall frost
- 10%
- 09-11
- 20%
- 09-16
- 50%
- 09-24
- 80%
- 10-01
- 90%
- 10-05
28°F — killing freeze
Last spring freeze
- 10%
- 05-18
- 20%
- 05-13
- 50%
- 05-04
- 80%
- 04-26
- 90%
- 04-20
First fall freeze
- 10%
- 09-22
- 20%
- 09-27
- 50%
- 10-04
- 80%
- 10-12
- 90%
- 10-17
Growing season length (days, 28°F threshold)
- Short year
- 127
- Median
- 153
- Long year
- 180
Source NOAA station
VALIER, MT US
5.9 mi · 30 yrs of record (1991–2020) · 3807 ft elev.
Data from VALIER, MT US, 5.9 miles away with 30-year NOAA record (1991-2020).
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