Otter Tail County, Minnesota · Frost dates
Otter Tail County frost dates.
First-frost, last-frost, and growing-season length for Otter Tail County, Minnesota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-18
- 20%
- 05-14
- 50%
- 05-05
- 80%
- 04-29
- 90%
- 04-24
First fall frost
- 10%
- 09-23
- 20%
- 09-27
- 50%
- 10-05
- 80%
- 10-13
- 90%
- 10-19
28°F — killing freeze
Last spring freeze
- 10%
- 05-10
- 20%
- 05-05
- 50%
- 04-28
- 80%
- 04-18
- 90%
- 04-13
First fall freeze
- 10%
- 10-01
- 20%
- 10-05
- 50%
- 10-15
- 80%
- 10-24
- 90%
- 10-29
Growing season length (days, 28°F threshold)
- Short year
- 144
- Median
- 170
- Long year
- 199
Source NOAA station
OTTERTAIL, MN US
8.0 mi · 30 yrs of record (1991–2020) · 1349 ft elev.
Data from OTTERTAIL, MN US, 8 miles away with 30-year NOAA record (1991-2020).
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