Two Rivers, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.8 °F (low) to 52.2 °F (high). Annual precipitation averages 32 Inches. 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 | 13.5 °F | 27.2 °F | 1.69 in. |
| February | 15.6 °F | 29.9 °F | 1.4 in. |
| March | 24.4 °F | 38.2 °F | 1.84 in. |
| April | 34.9 °F | 48.8 °F | 3.4 in. |
| May | 44.2 °F | 59.6 °F | 3.26 in. |
| June | 54.0 °F | 70.1 °F | 4.35 in. |
| July | 60.5 °F | 76.1 °F | 3.44 in. |
| August | 60.8 °F | 75.7 °F | 3.27 in. |
| September | 53.3 °F | 68.4 °F | 2.54 in. |
| October | 42.0 °F | 56.0 °F | 2.87 in. |
| November | 30.7 °F | 43.5 °F | 2.08 in. |
| December | 20.1 °F | 32.9 °F | 1.86 in. |
| Annual | 37.8 °F | 52.2 °F | 32 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |