Greenville, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.4 °F (low) to 54.5 °F (high). Annual precipitation averages 33.4 Inches. Greenville 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 | 10.0 °F | 25.2 °F | 1.36 in. |
| February | 12.1 °F | 28.8 °F | 1.17 in. |
| March | 22.5 °F | 40.2 °F | 1.88 in. |
| April | 34.4 °F | 53.9 °F | 3.24 in. |
| May | 46.4 °F | 66.6 °F | 3.8 in. |
| June | 56.6 °F | 76.2 °F | 4.61 in. |
| July | 60.9 °F | 80.9 °F | 3.86 in. |
| August | 59.0 °F | 78.6 °F | 3.65 in. |
| September | 50.9 °F | 71.5 °F | 3.33 in. |
| October | 38.9 °F | 57.8 °F | 2.89 in. |
| November | 27.8 °F | 43.3 °F | 1.91 in. |
| December | 16.7 °F | 30.7 °F | 1.71 in. |
| Annual | 36.4 °F | 54.5 °F | 33.41 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 |