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Climate Data for Green Lake 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 28. First Fall Frost Zones.
- (The first frost occurs on or before September 17 in 10 percent of the years.)
- Median growing season: 137 days. Range: 119 to 154 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°) |
25.5 |
30.2 |
42.7 |
57.6 |
69.8 |
79.7 |
83.7 |
81.0 |
73.2 |
61.6 |
45.8 |
30.9 |
| Ave Daily Low (F°) |
5.4 |
9.9 |
22.9 |
34.9 |
45.4 |
54.6 |
59.4 |
56.5 |
47.9 |
36.7 |
25.9 |
12.1 |
| Growing Degree Days |
0 |
2 |
32 |
143 |
333 |
510 |
645 |
578 |
376 |
185 |
34 |
3 |
| Heating Degree Days |
1519 |
1243 |
1014 |
567 |
259 |
56 |
8 |
26 |
146 |
474 |
876 |
1352 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
36 |
107 |
207 |
150 |
17 |
5 |
0 |
0 |
| Ave Precipitation (") |
1.08 |
1.04 |
2.14 |
2.79 |
3.31 |
3.76 |
3.29 |
3.61 |
4.11 |
2.38 |
2.14 |
1.54 |
| Ave Snowfall (") |
9.3 |
7.5 |
8.3 |
2.2 |
0.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.3 |
3.6 |
10.9 |
Data from the weather station at Dalton, latitude 43°39' N, longitude 89°12' W, elevation 857 ft.
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