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Climate Data for Columbia 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 14. Last Spring Frost Zones.
- (The last frost occurs on or after May 31 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 15 in 10 percent of the years.)
- Median growing season: 139 days. Range: 109 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°) |
24.7 |
29.6 |
41.8 |
57.0 |
69.1 |
78.7 |
83.1 |
80.1 |
71.2 |
60.4 |
44.1 |
29.5 |
| Ave Daily Low (F°) |
5.0 |
8.7 |
22.1 |
34.3 |
44.6 |
53.6 |
58.4 |
55.8 |
47.3 |
37.4 |
25.7 |
12.2 |
| Growing Degree Days |
0 |
2 |
38 |
164 |
360 |
523 |
645 |
577 |
390 |
200 |
39 |
3 |
| Heating Degree Days |
1556 |
1282 |
1026 |
582 |
286 |
77 |
16 |
45 |
187 |
506 |
903 |
1367 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
35 |
113 |
196 |
138 |
16 |
7 |
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 (") |
9.0 |
7.5 |
6.5 |
1.5 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
2.5 |
8.8 |
Data from the weather station at Portage, latitude 43°31' N, longitude 89°26' W, elevation 800 ft.
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