Phillips County, Montana · Frost dates
Phillips County frost dates.
First-frost, last-frost, and growing-season length for Phillips County, Montana. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4b
32°F — light freeze
Last spring frost
- 10%
- 05-22
- 20%
- 05-17
- 50%
- 05-10
- 80%
- 05-02
- 90%
- 04-29
First fall frost
- 10%
- 09-17
- 20%
- 09-21
- 50%
- 09-29
- 80%
- 10-06
- 90%
- 10-10
28°F — killing freeze
Last spring freeze
- 10%
- 05-12
- 20%
- 05-07
- 50%
- 04-30
- 80%
- 04-18
- 90%
- 04-13
First fall freeze
- 10%
- 09-23
- 20%
- 09-28
- 50%
- 10-06
- 80%
- 10-15
- 90%
- 10-19
Growing season length (days, 28°F threshold)
- Short year
- 134
- Median
- 159
- Long year
- 189
Source NOAA station
MALTA, MT US
8.0 mi · 30 yrs of record (1991–2020) · 2262 ft elev.
Data from MALTA, MT US, 8 miles away with 30-year NOAA record (1991-2020).
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