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Climate Data for Jackson 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 30. Last Spring Frost Zones.
- (The last frost occurs on or after June 13 in 10 percent of the years.)
- Median date of first frost in the fall: September 17. First Fall Frost Zones.
- (The first frost occurs on or before August 30 in 10 percent of the years.)
- Median growing season: 111 days. Range: 88 to 133 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°) |
24.7 |
31.1 |
43.4 |
59.4 |
72.4 |
80.1 |
84.5 |
81.9 |
73.2 |
61.7 |
43.8 |
28.6 |
| Ave Daily Low (F°) |
1.0 |
5.1 |
18.5 |
31.0 |
41.3 |
50.4 |
55.8 |
53.5 |
45.1 |
35.2 |
23.1 |
8.3 |
| Growing Degree Days |
1 |
2 |
35 |
167 |
362 |
485 |
605 |
555 |
368 |
199 |
34 |
2 |
| Heating Degree Days |
1615 |
1313 |
1054 |
594 |
285 |
75 |
18 |
41 |
184 |
512 |
945 |
1442 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
34 |
84 |
179 |
125 |
10 |
0 |
0 |
0 |
| Ave Precipitation (") |
1.03 |
1.01 |
2.19 |
2.94 |
3.65 |
3.96 |
4.12 |
4.12 |
4.09 |
2.37 |
1.98 |
1.52 |
| Ave Snowfall (") |
10.4 |
7.9 |
9.5 |
1.8 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
2.8 |
10.3 |
Data from the weather station at Hatfield Hydro Plant, latitude 44°24' N, longitude 90°44' W, elevation 953 ft.
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