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Climate Data for Monroe County, Wisconsin
Climate Normals and Growing Season Summary
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).
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