Rock Falls, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.1 °F (low) to 55.4 °F (high). Annual precipitation averages 34.3 Inches. 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 | 6.1 °F | 24.0 °F | 1.03 in. |
| February | 9.7 °F | 29.0 °F | 1.09 in. |
| March | 21.6 °F | 41.4 °F | 1.93 in. |
| April | 34.1 °F | 56.5 °F | 3.18 in. |
| May | 46.4 °F | 69.0 °F | 4.22 in. |
| June | 56.8 °F | 78.3 °F | 4.99 in. |
| July | 60.8 °F | 82.3 °F | 3.93 in. |
| August | 58.5 °F | 80.4 °F | 4.37 in. |
| September | 50.3 °F | 72.7 °F | 3.74 in. |
| October | 37.9 °F | 58.9 °F | 2.63 in. |
| November | 25.7 °F | 42.5 °F | 1.8 in. |
| December | 13.6 °F | 29.2 °F | 1.39 in. |
| Annual | 35.1 °F | 55.4 °F | 34.3 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |