Cassville, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.1 °F (low) to 57.8 °F (high). Annual precipitation averages 37.4 Inches. Cassville is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.4 °F | 27.4 °F | 1.25 in. |
| February | 13.9 °F | 32.0 °F | 1.27 in. |
| March | 25.7 °F | 44.7 °F | 1.98 in. |
| April | 37.2 °F | 58.6 °F | 3.73 in. |
| May | 48.8 °F | 70.5 °F | 4.49 in. |
| June | 59.2 °F | 80.0 °F | 5.72 in. |
| July | 63.0 °F | 83.4 °F | 4.75 in. |
| August | 60.8 °F | 81.6 °F | 3.84 in. |
| September | 52.3 °F | 74.8 °F | 3.8 in. |
| October | 40.2 °F | 61.7 °F | 2.82 in. |
| November | 28.3 °F | 45.9 °F | 2.12 in. |
| December | 17.5 °F | 33.1 °F | 1.63 in. |
| Annual | 38.1 °F | 57.8 °F | 37.4 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |