Belgium, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.8 °C (low) to 12.5 °C (high). Annual precipitation averages 849.4 Millimeters. Belgium is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.9 °C | -2.6 °C | 39.88 mm |
| February | -9.7 °C | -0.8 °C | 38.1 mm |
| March | -4.4 °C | 4.9 °C | 51.56 mm |
| April | 1.2 °C | 11.1 °C | 97.03 mm |
| May | 7.1 °C | 17.4 °C | 99.31 mm |
| June | 12.7 °C | 23.2 °C | 86.61 mm |
| July | 15.9 °C | 26.5 °C | 94.74 mm |
| August | 15.2 °C | 25.7 °C | 96.52 mm |
| September | 10.8 °C | 21.9 °C | 76.45 mm |
| October | 4.4 °C | 14.7 °C | 73.15 mm |
| November | -1.7 °C | 7.2 °C | 49.02 mm |
| December | -7.3 °C | 0.7 °C | 46.99 mm |
| Annual | 2.8 °C | 12.5 °C | 849.36 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |