Dane County, Wisconsin · Frost dates
Dane County frost dates.
First-frost, last-frost, and growing-season length for Dane 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%
- 05-11
- 50%
- 05-01
- 80%
- 04-22
- 90%
- 04-18
First fall frost
- 10%
- 09-26
- 20%
- 10-01
- 50%
- 10-09
- 80%
- 10-18
- 90%
- 10-24
28°F — killing freeze
Last spring freeze
- 10%
- 05-03
- 20%
- 04-29
- 50%
- 04-20
- 80%
- 04-11
- 90%
- 04-07
First fall freeze
- 10%
- 10-05
- 20%
- 10-11
- 50%
- 10-20
- 80%
- 10-30
- 90%
- 11-03
Growing season length (days, 28°F threshold)
- Short year
- 155
- Median
- 183
- Long year
- 210
Source NOAA station
UW ARBORETUM - MADISON, WI US
1.9 mi · 30 yrs of record (1991–2020) · 870 ft elev.
Data from UW ARBORETUM - MADISON, WI US, 1.9 miles away with 30-year NOAA record (1991-2020).
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