Belleville, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.4 °F (low) to 56.9 °F (high). Annual precipitation averages 38.2 Inches. Belleville is located in USDA Plant Hardiness Zone 5a. 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 | 10.9 °F | 27.2 °F | 1.51 in. |
| February | 14.0 °F | 31.3 °F | 1.57 in. |
| March | 24.5 °F | 43.5 °F | 2.1 in. |
| April | 35.7 °F | 57.3 °F | 3.83 in. |
| May | 47.5 °F | 69.2 °F | 4.37 in. |
| June | 57.7 °F | 78.8 °F | 5.61 in. |
| July | 61.7 °F | 82.4 °F | 4.34 in. |
| August | 59.7 °F | 80.7 °F | 4.28 in. |
| September | 51.1 °F | 73.6 °F | 3.66 in. |
| October | 39.6 °F | 60.7 °F | 2.91 in. |
| November | 28.3 °F | 45.4 °F | 2.27 in. |
| December | 17.8 °F | 32.8 °F | 1.75 in. |
| Annual | 37.4 °F | 56.9 °F | 38.2 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |