Racine, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5 °C (low) to 12.8 °C (high). Annual precipitation averages 920.5 Millimeters. Racine is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | -1.2 °C | 48.01 mm |
| February | -7.1 °C | 0.4 °C | 48.01 mm |
| March | -2.2 °C | 5.3 °C | 61.98 mm |
| April | 3.1 °C | 10.8 °C | 101.35 mm |
| May | 8.4 °C | 16.8 °C | 102.36 mm |
| June | 14.2 °C | 22.6 °C | 105.66 mm |
| July | 18.1 °C | 26.1 °C | 79.76 mm |
| August | 18.1 °C | 25.5 °C | 93.22 mm |
| September | 13.8 °C | 21.8 °C | 83.31 mm |
| October | 7.1 °C | 15.1 °C | 80.26 mm |
| November | 0.6 °C | 8.1 °C | 63.25 mm |
| December | -5.2 °C | 1.8 °C | 53.34 mm |
| Annual | 5 °C | 12.8 °C | 920.51 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |