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Climate Data for Walworth County, Wisconsin

Climate Normals and Growing Season Summary

Temperature norms and extremes for Walworth County, Wisconsin
Chart courtesy of the Midwestern Regional Climate Center.

Growing Season Summary:

Median date of last frost in the spring: May 3. Last Spring Frost Zones.
(The last frost occurs on or after May 11 in 10 percent of the years.)

Median date of first frost in the fall: October 10. First Fall Frost Zones.
(The first frost occurs on or before September 29 in 10 percent of the years.)

Median growing season: 162 days. Range: 142 to 183 days.

For perennials, landscape plantings and fruit trees, see our Map of USDA Plant Hardiness Zones for Wisconsin.

Climate Normals Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec
Ave Daily High (F°) 27.4 32.6 44.0 58.4 71.1 81.0 85.0 82.4 74.5 62.0 46.5 32.2
Ave Daily Low (F°) 10.9 14.9 25.6 36.6 46.9 56.6 61.9 60.1 52.4 41.6 30.3 17.2
Growing Degree Days 1 2 38 158 365 560 696 646 436 210 44 4
Heating Degree Days 1420 1154 933 525 232 30 0 13 88 415 795 1249
Cooling Degree Days 0 0 0 0 46 144 267 208 43 6 0 0
Ave Precipitation (") 1.84 1.46 2.78 3.66 3.25 3.88 4.30 3.92 4.09 2.74 2.65 2.34
Ave Snowfall (") 12.8 9.3 8.9 2.4 0.1 0.0 0.0 0.0 0.0 0.2 3.0 11.4


Data from the weather station at Lake Geneva, latitude 42°36' N, longitude 88°26' W, elevation 880 ft.

Climate Notes

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