Walworth County, Wisconsin · Frost dates
Walworth County frost dates.
First-frost, last-frost, and growing-season length for Walworth County, Wisconsin. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-14
- 20%
- 05-08
- 50%
- 04-28
- 80%
- 04-17
- 90%
- 04-12
First fall frost
- 10%
- 09-28
- 20%
- 10-03
- 50%
- 10-14
- 80%
- 10-22
- 90%
- 10-26
28°F — killing freeze
Last spring freeze
- 10%
- 05-01
- 20%
- 04-26
- 50%
- 04-15
- 80%
- 04-06
- 90%
- 04-02
First fall freeze
- 10%
- 10-08
- 20%
- 10-15
- 50%
- 10-25
- 80%
- 11-03
- 90%
- 11-08
Growing season length (days, 28°F threshold)
- Short year
- 160
- Median
- 193
- Long year
- 220
Source NOAA station
DELAVAN WWTP, WI US
6.4 mi · 30 yrs of record (1991–2020) · 882 ft elev.
Data from DELAVAN WWTP, WI US, 6.4 miles away with 30-year NOAA record (1991-2020).
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