Rock Falls, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.7 °C (low) to 13 °C (high). Annual precipitation averages 871.2 Millimeters. Rock 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.4 °C | -4.4 °C | 26.16 mm |
| February | -12.4 °C | -1.7 °C | 27.69 mm |
| March | -5.8 °C | 5.2 °C | 49.02 mm |
| April | 1.2 °C | 13.6 °C | 80.77 mm |
| May | 8 °C | 20.6 °C | 107.19 mm |
| June | 13.8 °C | 25.7 °C | 126.75 mm |
| July | 16 °C | 27.9 °C | 99.82 mm |
| August | 14.7 °C | 26.9 °C | 111 mm |
| September | 10.2 °C | 22.6 °C | 95 mm |
| October | 3.3 °C | 14.9 °C | 66.8 mm |
| November | -3.5 °C | 5.8 °C | 45.72 mm |
| December | -10.2 °C | -1.6 °C | 35.31 mm |
| Annual | 1.7 °C | 13 °C | 871.23 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |