Bellevue, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36 °F (low) to 54 °F (high). Annual precipitation averages 31.7 Inches. Bellevue 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 | 10.3 °F | 25.2 °F | 1.49 in. |
| February | 12.2 °F | 28.6 °F | 1.12 in. |
| March | 22.2 °F | 39.6 °F | 1.71 in. |
| April | 33.6 °F | 52.7 °F | 3.06 in. |
| May | 45.1 °F | 65.6 °F | 3.5 in. |
| June | 55.3 °F | 75.1 °F | 4.04 in. |
| July | 59.8 °F | 79.9 °F | 3.59 in. |
| August | 58.4 °F | 78.3 °F | 3.42 in. |
| September | 50.5 °F | 71.1 °F | 3.3 in. |
| October | 39.1 °F | 57.5 °F | 2.86 in. |
| November | 28.1 °F | 43.3 °F | 1.97 in. |
| December | 17.2 °F | 30.8 °F | 1.67 in. |
| Annual | 36 °F | 54 °F | 31.73 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 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |