Gilmanton, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.9 °C (low) to 13.5 °C (high). Annual precipitation averages 903 Millimeters. 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 | -14.2 °C | -3.9 °C | 26.67 mm |
| February | -12.2 °C | -1.2 °C | 28.19 mm |
| March | -5.4 °C | 5.8 °C | 49.78 mm |
| April | 1.4 °C | 14.4 °C | 86.87 mm |
| May | 8.1 °C | 21.2 °C | 111.51 mm |
| June | 13.9 °C | 26.3 °C | 132.33 mm |
| July | 16.1 °C | 28.4 °C | 105.16 mm |
| August | 14.9 °C | 27.4 °C | 117.6 mm |
| September | 10.4 °C | 23.1 °C | 98.3 mm |
| October | 3.5 °C | 15.7 °C | 64.26 mm |
| November | -3.3 °C | 6.3 °C | 47.24 mm |
| December | -9.9 °C | -1.1 °C | 35.05 mm |
| Annual | 1.9 °C | 13.5 °C | 902.96 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |