Clearwater County, Minnesota · Frost dates
Clearwater County frost dates.
First-frost, last-frost, and growing-season length for Clearwater County, Minnesota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-30
- 20%
- 05-25
- 50%
- 05-15
- 80%
- 05-05
- 90%
- 05-02
First fall frost
- 10%
- 09-10
- 20%
- 09-16
- 50%
- 09-26
- 80%
- 10-04
- 90%
- 10-08
28°F — killing freeze
Last spring freeze
- 10%
- 05-20
- 20%
- 05-14
- 50%
- 05-04
- 80%
- 04-25
- 90%
- 04-20
First fall freeze
- 10%
- 09-23
- 20%
- 09-27
- 50%
- 10-05
- 80%
- 10-16
- 90%
- 10-22
Growing season length (days, 28°F threshold)
- Short year
- 126
- Median
- 154
- Long year
- 185
Source NOAA station
FOSSTON 1 E, MN US
16.5 mi · 30 yrs of record (1991–2020) · 1300 ft elev.
Data from FOSSTON 1 E, MN US, 16.5 miles away with 30-year NOAA record (1991-2020).
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