Marshall County, Minnesota · Frost dates
Marshall County frost dates.
First-frost, last-frost, and growing-season length for Marshall County, Minnesota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-20
- 20%
- 05-15
- 50%
- 05-06
- 80%
- 04-29
- 90%
- 04-25
First fall frost
- 10%
- 09-20
- 20%
- 09-25
- 50%
- 10-03
- 80%
- 10-10
- 90%
- 10-16
28°F — killing freeze
Last spring freeze
- 10%
- 05-11
- 20%
- 05-06
- 50%
- 04-28
- 80%
- 04-19
- 90%
- 04-14
First fall freeze
- 10%
- 09-30
- 20%
- 10-03
- 50%
- 10-12
- 80%
- 10-22
- 90%
- 10-26
Growing season length (days, 28°F threshold)
- Short year
- 142
- Median
- 167
- Long year
- 195
Source NOAA station
AGASSIZ REFUGE, MN US
17.8 mi · 30 yrs of record (1991–2020) · 1142 ft elev.
Data from AGASSIZ REFUGE, MN US, 17.8 miles away with 30-year NOAA record (1991-2020).
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