Townsend, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1 °C (low) to 11.3 °C (high). Annual precipitation averages 820.7 Millimeters. Townsend is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.9 °C | -5.1 °C | 31.75 mm |
| February | -14.7 °C | -2.6 °C | 28.96 mm |
| March | -9.1 °C | 3.7 °C | 40.64 mm |
| April | -2.2 °C | 11 °C | 74.42 mm |
| May | 4.6 °C | 18.8 °C | 86.61 mm |
| June | 10.3 °C | 23.8 °C | 105.66 mm |
| July | 12.4 °C | 26.1 °C | 101.85 mm |
| August | 11.4 °C | 24.9 °C | 86.87 mm |
| September | 7.2 °C | 20.5 °C | 91.69 mm |
| October | 0.8 °C | 12.8 °C | 85.34 mm |
| November | -5.1 °C | 4.4 °C | 50.29 mm |
| December | -11.7 °C | -2.3 °C | 36.58 mm |
| Annual | -1 °C | 11.3 °C | 820.66 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |