Warrens, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1 °C (low) to 12.8 °C (high). Annual precipitation averages 901.4 Millimeters. Warrens 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 | -14.3 °C | -3.9 °C | 29.46 mm |
| February | -12.7 °C | -1.2 °C | 26.67 mm |
| March | -6.3 °C | 5.5 °C | 46.74 mm |
| April | 0.5 °C | 13.1 °C | 90.68 mm |
| May | 7.1 °C | 19.9 °C | 109.98 mm |
| June | 12.6 °C | 25.2 °C | 134.37 mm |
| July | 14.7 °C | 27.3 °C | 106.93 mm |
| August | 13.3 °C | 26.1 °C | 109.47 mm |
| September | 8.8 °C | 22 °C | 91.44 mm |
| October | 2.7 °C | 14.6 °C | 71.37 mm |
| November | -3.8 °C | 6.1 °C | 46.48 mm |
| December | -10.2 °C | -1 °C | 37.85 mm |
| Annual | 1 °C | 12.8 °C | 901.44 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |