Star Prairie, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.2 °F (low) to 54 °F (high). Annual precipitation averages 33.2 Inches. Star Prairie is located in USDA Plant Hardiness Zone 4b. 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 | 4.6 °F | 22.7 °F | 0.92 in. |
| February | 7.6 °F | 27.8 °F | 0.89 in. |
| March | 20.0 °F | 40.2 °F | 1.57 in. |
| April | 33.1 °F | 54.5 °F | 2.98 in. |
| May | 45.8 °F | 67.3 °F | 3.99 in. |
| June | 56.1 °F | 76.7 °F | 4.86 in. |
| July | 60.3 °F | 81.2 °F | 4.43 in. |
| August | 58.0 °F | 79.3 °F | 4.23 in. |
| September | 49.8 °F | 71.7 °F | 3.49 in. |
| October | 37.3 °F | 57.4 °F | 2.93 in. |
| November | 25.0 °F | 41.6 °F | 1.68 in. |
| December | 12.2 °F | 27.9 °F | 1.26 in. |
| Annual | 34.2 °F | 54 °F | 33.23 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 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |