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Climate Data for Dane 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 April 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 19 in 10 percent of the years.)
- Median growing season: 140 days. Range: 116 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°) |
24.8 |
30.1 |
41.5 |
56.7 |
68.9 |
78.2 |
82.4 |
79.6 |
71.5 |
59.9 |
44.0 |
29.8 |
| Ave Daily Low (F°) |
7.2 |
11.1 |
23.0 |
34.1 |
44.2 |
54.2 |
59.5 |
56.9 |
48.2 |
37.7 |
26.7 |
13.5 |
| Growing Degree Days |
1 |
2 |
37 |
151 |
333 |
507 |
638 |
574 |
372 |
182 |
37 |
3 |
| Heating Degree Days |
1519 |
1243 |
1014 |
588 |
294 |
68 |
12 |
38 |
168 |
499 |
888 |
1342 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
30 |
140 |
198 |
141 |
12 |
0 |
0 |
0 |
| Ave Precipitation (") |
1.07 |
1.08 |
2.17 |
2.86 |
3.14 |
3.66 |
3.39 |
4.04 |
3.37 |
2.17 |
2.09 |
1.84 |
| Ave Snowfall (") |
10.2 |
7.3 |
7.9 |
2.6 |
0.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.2 |
3.4 |
12.4 |
Data from the weather station at Madison WSO Airport, latitude 43°08' N, longitude 89°20' W, elevation 858 ft.
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