River Falls, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 54.3 °F (high). Annual precipitation averages 33.5 Inches. River Falls 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 | 5.7 °F | 22.9 °F | 0.91 in. |
| February | 8.9 °F | 27.8 °F | 0.82 in. |
| March | 21.2 °F | 40.3 °F | 1.52 in. |
| April | 34.1 °F | 55.2 °F | 2.88 in. |
| May | 46.7 °F | 67.7 °F | 4.14 in. |
| June | 57.1 °F | 77.3 °F | 5.13 in. |
| July | 61.4 °F | 81.6 °F | 4.46 in. |
| August | 59.0 °F | 79.3 °F | 4.67 in. |
| September | 50.9 °F | 71.8 °F | 3.55 in. |
| October | 37.9 °F | 57.7 °F | 2.7 in. |
| November | 25.4 °F | 41.7 °F | 1.56 in. |
| December | 13.1 °F | 28.1 °F | 1.13 in. |
| Annual | 35.1 °F | 54.3 °F | 33.47 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 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |