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Climate Data for Vernon County, Wisconsin

Climate Normals and Growing Season Summary

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

Growing Season Summary:

Median date of last frost in the spring: May 14. Last Spring Frost Zones.
(The last frost occurs on or after May 27 in 10 percent of the years.)

Median date of first frost in the fall: September 28. First Fall Frost Zones.
(The first frost occurs on or before September 14 in 10 percent of the years.)

Median growing season: 138 days. Range: 109 to 155 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°) 23.3 29.3 41.4 57.5 69.6 77.9 82.6 79.8 71.1 59.8 43.1 27.8
Ave Daily Low (F°) 4.1 8.7 21.5 34.0 44.9 54.2 58.7 56.1 48.1 37.6 25.5 10.8
Growing Degree Days 0 1 30 149 333 501 622 557 356 177 30 2
Heating Degree Days 1590 1285 1039 576 273 57 9 31 171 512 921 1417
Cooling Degree Days 0 0 0 0 32 90 186 124 9 6 0 0
Ave Precipitation (") 0.79 0.85 1.63 3.12 3.35 3.73 4.17 4.16 4.15 2.28 1.66 1.18
Ave Snowfall (") 8.7 7.0 6.8 1.7 0.0 0.0 0.0 0.0 0.0 0.2 3.3 10.2


Data from the weather station at Viroqua 2 NW, latitude 43°34' N, longitude 90°54' W, elevation 1200 ft.

Climate Notes

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