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Climate Data for Forest 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: June 10. Last Spring Frost Zones.
- (The last frost occurs on or after May 18 in 10 percent of the years.)
- Median date of first frost in the fall: September 14. First Fall Frost Zones.
- (The first frost occurs on or before August 19 in 10 percent of the years.)
- Median growing season: 99 days. Range: 65 to 123 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°) |
21.0 |
26.2 |
37.5 |
52.9 |
66.2 |
73.1 |
77.2 |
73.9 |
64.8 |
54.6 |
37.8 |
24.3 |
| Ave Daily Low (F°) |
1.6 |
4.6 |
15.7 |
28.6 |
39.2 |
48.3 |
53.8 |
51.7 |
44.4 |
34.6 |
22.5 |
8.1 |
| Growing Degree Days |
0 |
0 |
11 |
99 |
269 |
385 |
499 |
432 |
250 |
114 |
13 |
0 |
| Heating Degree Days |
1665 |
1389 |
1190 |
726 |
396 |
160 |
59 |
111 |
312 |
632 |
1044 |
1513 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
15 |
31 |
74 |
43 |
0 |
0 |
0 |
0 |
| Ave Precipitation (") |
1.05 |
0.88 |
1.91 |
2.53 |
3.34 |
3.79 |
3.35 |
3.70 |
3.99 |
2.59 |
2.04 |
1.47 |
| Ave Snowfall (") |
14.2 |
10.6 |
12.5 |
5.0 |
0.9 |
0.0 |
0.0 |
0.0 |
0.0 |
1.6 |
8.3 |
16.2 |
Data from the weather station at Laona 6 SW, latitude 45°31' N, longitude 88°45' W, elevation 1525 ft.
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