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Climate Data for Grant 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 4. Last Spring Frost Zones.
- (The last frost occurs on or after May 19 in 10 percent of the years.)
- Median date of first frost in the fall: October 6. First Fall Frost Zones.
- (The first frost occurs on or before September 26 in 10 percent of the years.)
- Median growing season: 158 days. Range: 138 to 179 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°) |
23.9 |
29.7 |
42.0 |
57.3 |
69.1 |
78.7 |
82.9 |
80.4 |
71.8 |
60.6 |
43.8 |
29.2 |
| Ave Daily Low (F°) |
6.5 |
11.3 |
24.4 |
36.3 |
47.4 |
56.5 |
61.1 |
59.0 |
51.1 |
40.1 |
27.0 |
13.1 |
| Growing Degree Days |
0 |
3 |
36 |
152 |
350 |
539 |
667 |
609 |
394 |
192 |
36 |
3 |
| Heating Degree Days |
1541 |
1243 |
986 |
546 |
244 |
41 |
5 |
23 |
131 |
460 |
888 |
1358 |
| Cooling Degree Days |
0 |
0 |
0 |
0 |
37 |
122 |
222 |
168 |
26 |
7 |
0 |
0 |
| Ave Precipitation (") |
0.84 |
0.93 |
2.16 |
3.01 |
3.58 |
4.07 |
3.99 |
4.41 |
3.84 |
2.47 |
2.14 |
1.34 |
| Ave Snowfall (") |
9.4 |
7.4 |
7.2 |
2.7 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.1 |
3.0 |
10.4 |
Data from the weather station at Lancaster 4 WSW, latitude 45°20' N, longitude 90°47' W, elevation 1042 ft.
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