Two Rivers, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.2 °C (low) to 11.2 °C (high). Annual precipitation averages 812.8 Millimeters. Two Rivers is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.3 °C | -2.7 °C | 42.93 mm |
| February | -9.1 °C | -1.2 °C | 35.56 mm |
| March | -4.2 °C | 3.4 °C | 46.74 mm |
| April | 1.6 °C | 9.3 °C | 86.36 mm |
| May | 6.8 °C | 15.3 °C | 82.8 mm |
| June | 12.2 °C | 21.2 °C | 110.49 mm |
| July | 15.8 °C | 24.5 °C | 87.38 mm |
| August | 16 °C | 24.3 °C | 83.06 mm |
| September | 11.8 °C | 20.2 °C | 64.52 mm |
| October | 5.6 °C | 13.3 °C | 72.9 mm |
| November | -0.7 °C | 6.4 °C | 52.83 mm |
| December | -6.6 °C | 0.5 °C | 47.24 mm |
| Annual | 3.2 °C | 11.2 °C | 812.81 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |