Brussels, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37 °F (low) to 52.8 °F (high). Annual precipitation averages 32 Inches. Brussels 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.0 °F | 24.9 °F | 1.57 in. |
| February | 13.2 °F | 27.8 °F | 1.15 in. |
| March | 22.9 °F | 38.4 °F | 1.76 in. |
| April | 34.0 °F | 50.5 °F | 3.07 in. |
| May | 45.0 °F | 63.5 °F | 3.41 in. |
| June | 54.8 °F | 73.5 °F | 3.84 in. |
| July | 60.3 °F | 78.6 °F | 3.65 in. |
| August | 59.6 °F | 77.5 °F | 3.42 in. |
| September | 51.9 °F | 69.7 °F | 3.23 in. |
| October | 40.6 °F | 56.0 °F | 3.06 in. |
| November | 30.1 °F | 42.6 °F | 2.1 in. |
| December | 19.4 °F | 31.0 °F | 1.77 in. |
| Annual | 37 °F | 52.8 °F | 32.03 in. |
| 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |