Gilmanton, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.5 °F (low) to 56.4 °F (high). Annual precipitation averages 35.6 Inches. Gilmanton is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.5 °F | 24.9 °F | 1.05 in. |
| February | 10.1 °F | 29.9 °F | 1.11 in. |
| March | 22.2 °F | 42.4 °F | 1.96 in. |
| April | 34.5 °F | 58.0 °F | 3.42 in. |
| May | 46.6 °F | 70.1 °F | 4.39 in. |
| June | 57.0 °F | 79.3 °F | 5.21 in. |
| July | 61.0 °F | 83.2 °F | 4.14 in. |
| August | 58.9 °F | 81.3 °F | 4.63 in. |
| September | 50.8 °F | 73.5 °F | 3.87 in. |
| October | 38.3 °F | 60.3 °F | 2.53 in. |
| November | 26.1 °F | 43.4 °F | 1.86 in. |
| December | 14.1 °F | 30.1 °F | 1.38 in. |
| Annual | 35.5 °F | 56.4 °F | 35.55 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |