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Climate Data for Portage 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 25 in 10 percent of the years.)
- Median date of first frost in the fall: September 27. First Fall Frost Zones.
- (The first frost occurs on or before September 21 in 10 percent of the years.)
- Median growing season: 145 days. Range: 123 to 159 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°) |
23.0 |
28.1 |
39.7 |
55.6 |
68.3 |
77.0 |
81.6 |
78.8 |
69.9 |
58.5 |
42.6 |
27.6 |
| Ave Daily Low (F°) |
4.4 |
8.4 |
20.6 |
34.1 |
45.0 |
54.0 |
59.2 |
56.9 |
48.7 |
38.5 |
26.1 |
11.4 |
| Growing Degree Days |
0 |
1 |
22 |
128 |
311 |
474 |
624 |
557 |
344 |
161 |
27 |
2 |
| Heating Degree Days |
1590 |
1308 |
1079 |
603 |
291 |
73 |
11 |
33 |
180 |
512 |
918 |
1411 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
33 |
88 |
178 |
123 |
9 |
0 |
0 |
0 |
| Ave Precipitation (") |
1.02 |
1.09 |
2.18 |
2.98 |
3.20 |
3.82 |
3.65 |
3.99 |
4.08 |
2.40 |
2.18 |
1.51 |
| Ave Snowfall (") |
9.7 |
7.7 |
7.8 |
1.4 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
3.9 |
11.5 |
Data from the weather station at Stevens Point, latitude 44°30' N, longitude 89°34' W, elevation 1079 ft.
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