Iowa County, Wisconsin · Frost dates
Iowa County frost dates.
First-frost, last-frost, and growing-season length for Iowa County, Wisconsin. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-17
- 20%
- 05-12
- 50%
- 05-03
- 80%
- 04-24
- 90%
- 04-19
First fall frost
- 10%
- 09-25
- 20%
- 09-30
- 50%
- 10-07
- 80%
- 10-16
- 90%
- 10-20
28°F — killing freeze
Last spring freeze
- 10%
- 05-06
- 20%
- 05-01
- 50%
- 04-22
- 80%
- 04-12
- 90%
- 04-08
First fall freeze
- 10%
- 10-03
- 20%
- 10-09
- 50%
- 10-18
- 80%
- 10-26
- 90%
- 10-30
Growing season length (days, 28°F threshold)
- Short year
- 150
- Median
- 179
- Long year
- 205
Source NOAA station
DODGEVILLE WWTP, WI US
2.9 mi · 30 yrs of record (1991–2020) · 1118 ft elev.
Data from DODGEVILLE WWTP, WI US, 2.9 miles away with 30-year NOAA record (1991-2020).
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