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Climate Data for Grant County, Wisconsin

Climate Normals and Growing Season Summary

Temperature norms and extremes for Grant County
Chart courtesy of the Midwestern Regional Climate Center.

Growing Season Summary:

Median date of last frost in the spring: May 4. Last Spring Frost Zones.
(The last frost occurs on or after May 19 in 10 percent of the years.)

Median date of first frost in the fall: October 6. First Fall Frost Zones.
(The first frost occurs on or before September 26 in 10 percent of the years.)

Median growing season: 158 days. Range: 138 to 179 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°) 23.9 29.7 42.0 57.3 69.1 78.7 82.9 80.4 71.8 60.6 43.8 29.2
Ave Daily Low (F°) 6.5 11.3 24.4 36.3 47.4 56.5 61.1 59.0 51.1 40.1 27.0 13.1
Growing Degree Days 0 3 36 152 350 539 667 609 394 192 36 3
Heating Degree Days 1541 1243 986 546 244 41 5 23 131 460 888 1358
Cooling Degree Days 0 0 0 0 37 122 222 168 26 7 0 0
Ave Precipitation (") 0.84 0.93 2.16 3.01 3.58 4.07 3.99 4.41 3.84 2.47 2.14 1.34
Ave Snowfall (") 9.4 7.4 7.2 2.7 0.0 0.0 0.0 0.0 0.0 0.1 3.0 10.4


Data from the weather station at Lancaster 4 WSW, latitude 45°20' N, longitude 90°47' W, elevation 1042 ft.

Climate Notes

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