Winona County, Minnesota · Frost dates
Winona County frost dates.
First-frost, last-frost, and growing-season length for Winona County, Minnesota. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 4a
32°F — light freeze
Last spring frost
- 10%
- 05-04
- 20%
- 05-01
- 50%
- 04-21
- 80%
- 04-11
- 90%
- 04-07
First fall frost
- 10%
- 10-04
- 20%
- 10-09
- 50%
- 10-19
- 80%
- 10-27
- 90%
- 11-01
28°F — killing freeze
Last spring freeze
- 10%
- 04-24
- 20%
- 04-20
- 50%
- 04-09
- 80%
- 04-02
- 90%
- 03-30
First fall freeze
- 10%
- 10-13
- 20%
- 10-19
- 50%
- 10-29
- 80%
- 11-07
- 90%
- 11-12
Growing season length (days, 28°F threshold)
- Short year
- 172
- Median
- 203
- Long year
- 227
Source NOAA station
WINONA, MN US
8.2 mi · 30 yrs of record (1991–2020) · 652 ft elev.
Data from WINONA, MN US, 8.2 miles away with 30-year NOAA record (1991-2020).
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