Monroe County, Wisconsin · Frost dates

Monroe County frost dates.

First-frost, last-frost, and growing-season length for Monroe County, Wisconsin. Sourced from NOAA 1991-2020 Climate Normals.

Data confidence: high · USDA zone: 5a

32°F — light freeze

Last spring frost

10%
05-22
20%
05-18
50%
05-09
80%
05-01
90%
04-26

First fall frost

10%
09-18
20%
09-23
50%
10-01
80%
10-09
90%
10-13

28°F — killing freeze

Last spring freeze

10%
05-13
20%
05-08
50%
04-29
80%
04-20
90%
04-15

First fall freeze

10%
09-27
20%
10-01
50%
10-11
80%
10-19
90%
10-24

Growing season length (days, 28°F threshold)

Short year
137
Median
165
Long year
192

Source NOAA station

SPARTA, WI US

9.8 mi · 30 yrs of record (19912020) · 782 ft elev.

Data from SPARTA, WI US, 9.8 miles away with 30-year NOAA record (1991-2020).

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