Waukesha County, Wisconsin · Frost dates
Waukesha County frost dates.
First-frost, last-frost, and growing-season length for Waukesha County, Wisconsin. Sourced from NOAA 1991-2020 Climate Normals.
Data confidence: high · USDA zone: 5a
32°F — light freeze
Last spring frost
- 10%
- 05-18
- 20%
- 05-12
- 50%
- 05-01
- 80%
- 04-22
- 90%
- 04-18
First fall frost
- 10%
- 09-29
- 20%
- 10-03
- 50%
- 10-13
- 80%
- 10-22
- 90%
- 10-25
28°F — killing freeze
Last spring freeze
- 10%
- 05-05
- 20%
- 04-30
- 50%
- 04-19
- 80%
- 04-10
- 90%
- 04-06
First fall freeze
- 10%
- 10-08
- 20%
- 10-15
- 50%
- 10-23
- 80%
- 11-01
- 90%
- 11-06
Growing season length (days, 28°F threshold)
- Short year
- 156
- Median
- 187
- Long year
- 214
Source NOAA station
WAUKESHA WWTP, WI US
2.9 mi · 30 yrs of record (1991–2020) · 789 ft elev.
Data from WAUKESHA WWTP, WI US, 2.9 miles away with 30-year NOAA record (1991-2020).
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