Watonwan County, Minnesota · Frost dates
Watonwan County frost dates.
First-frost, last-frost, and growing-season length for Watonwan County, Minnesota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-13
- 20%
- 05-08
- 50%
- 04-30
- 80%
- 04-20
- 90%
- 04-15
First fall frost
- 10%
- 09-25
- 20%
- 09-29
- 50%
- 10-07
- 80%
- 10-15
- 90%
- 10-20
28°F — killing freeze
Last spring freeze
- 10%
- 05-03
- 20%
- 04-29
- 50%
- 04-18
- 80%
- 04-09
- 90%
- 04-06
First fall freeze
- 10%
- 10-03
- 20%
- 10-08
- 50%
- 10-17
- 80%
- 10-25
- 90%
- 10-30
Growing season length (days, 28°F threshold)
- Short year
- 153
- Median
- 182
- Long year
- 207
Source NOAA station
ST JAMES WWTP, MN US
0.8 mi · 30 yrs of record (1991–2020) · 1070 ft elev.
Data from ST JAMES WWTP, MN US, 0.8 miles away with 30-year NOAA record (1991-2020).
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