Greenbush, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.7 °F (low) to 55 °F (high). Annual precipitation averages 33.7 Inches. Greenbush 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 | 10.8 °F | 26.2 °F | 1.6 in. |
| February | 13.8 °F | 30.1 °F | 1.39 in. |
| March | 23.6 °F | 41.7 °F | 1.94 in. |
| April | 34.4 °F | 53.7 °F | 3.53 in. |
| May | 45.8 °F | 65.8 °F | 3.92 in. |
| June | 55.8 °F | 75.9 °F | 4.15 in. |
| July | 60.6 °F | 80.8 °F | 3.73 in. |
| August | 58.9 °F | 78.7 °F | 3.64 in. |
| September | 50.7 °F | 72.0 °F | 2.95 in. |
| October | 39.4 °F | 58.4 °F | 2.95 in. |
| November | 28.4 °F | 44.2 °F | 2.06 in. |
| December | 17.9 °F | 31.9 °F | 1.79 in. |
| Annual | 36.7 °F | 55 °F | 33.65 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 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 |