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Climate Data for Monroe County, Wisconsin

Climate Normals and Growing Season Summary

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

Growing Season Summary:

Median date of last frost in the spring: May 12. Last Spring Frost Zones.
(The last frost occurs on or after May 30 in 10 percent of the years.)

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

Median growing season: 137 days. Range: 110 to 156 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°) 22.2 28.5 41.0 56.9 69.6 78.6 83.5 80.6 70.7 59.6 42.5 27.3
Ave Daily Low (F°) 1.9 6.0 20.2 33.7 44.2 53.6 58.4 55.7 46.5 36.2 24.3 9.4
Growing Degree Days 0 1 24 129 304 462 598 534 332 160 31 2
Heating Degree Days 1640 1338 1066 591 282 63 12 32 199 530 948 1445
Cooling Degree Days 0 0 0 0 31 96 198 132 7 0 0 0
Ave Precipitation (") 0.86 0.91 2.04 3.00 3.78 3.98 4.08 4.15 4.25 2.37 1.96 1.35
Ave Snowfall (") 10.4 8.0 7.6 1.7 0.0 0.0 0.0 0.0 0.0 0.1 3.0 10.6


Data from the weather station at Sparta, latitude 43°56' N, longitude 90°49' W, elevation 782 ft. Growing season data (including growing degree days and frost dates) are not available from the Sparta station, and have been taken from Mather 3 NW (Juneau County).

Climate Notes

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