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Climate Data for Winnebago 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 9. Last Spring Frost Zones.
- (The last frost occurs on or after May 23 in 10 percent of the years.)
- Median date of first frost in the fall: October 4. First Fall Frost Zones.
- (The first frost occurs on or before September 21 in 10 percent of the years.)
- Median growing season: 153 days. Range: 128 to 173 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°) |
24.1 |
28.7 |
39.8 |
54.5 |
68.0 |
77.4 |
82.5 |
79.6 |
70.9 |
58.9 |
43.3 |
29.0 |
| Ave Daily Low (F°) |
5.4 |
8.5 |
20.7 |
34.1 |
46.1 |
55.9 |
61.0 |
58.2 |
49.5 |
39.2 |
26.4 |
12.1 |
| Growing Degree Days |
0 |
1 |
21 |
116 |
319 |
493 |
653 |
592 |
373 |
167 |
28 |
2 |
| Heating Degree Days |
1556 |
1299 |
1076 |
621 |
281 |
56 |
6 |
22 |
158 |
498 |
903 |
1376 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
36 |
107 |
217 |
143 |
14 |
5 |
0 |
0 |
| Ave Precipitation (") |
1.23 |
1.08 |
2.25 |
2.85 |
3.15 |
3.29 |
3.28 |
3.88 |
3.82 |
2.37 |
2.30 |
1.65 |
| Ave Snowfall (") |
11.7 |
7.9 |
8.6 |
1.8 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
3.7 |
12.5 |
Data from the weather station at Oshkosh, latitude 44°02' N, longitude 88°33' W, elevation 750 ft.
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