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Climate Data for Walworth 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 3. Last Spring Frost Zones.
- (The last frost occurs on or after May 11 in 10 percent of the years.)
- Median date of first frost in the fall: October 10. First Fall Frost Zones.
- (The first frost occurs on or before September 29 in 10 percent of the years.)
- Median growing season: 162 days. Range: 142 to 183 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°) |
27.4 |
32.6 |
44.0 |
58.4 |
71.1 |
81.0 |
85.0 |
82.4 |
74.5 |
62.0 |
46.5 |
32.2 |
| Ave Daily Low (F°) |
10.9 |
14.9 |
25.6 |
36.6 |
46.9 |
56.6 |
61.9 |
60.1 |
52.4 |
41.6 |
30.3 |
17.2 |
| Growing Degree Days |
1 |
2 |
38 |
158 |
365 |
560 |
696 |
646 |
436 |
210 |
44 |
4 |
| Heating Degree Days |
1420 |
1154 |
933 |
525 |
232 |
30 |
0 |
13 |
88 |
415 |
795 |
1249 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
46 |
144 |
267 |
208 |
43 |
6 |
0 |
0 |
| Ave Precipitation (") |
1.84 |
1.46 |
2.78 |
3.66 |
3.25 |
3.88 |
4.30 |
3.92 |
4.09 |
2.74 |
2.65 |
2.34 |
| Ave Snowfall (") |
12.8 |
9.3 |
8.9 |
2.4 |
0.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.2 |
3.0 |
11.4 |
Data from the weather station at Lake Geneva, latitude 42°36' N, longitude 88°26' W, elevation 880 ft.
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