Rockland, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.7 °F (low) to 56.3 °F (high). Annual precipitation averages 36.1 Inches. Rockland 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 | 7.8 °F | 26.0 °F | 1.11 in. |
| February | 11.1 °F | 30.8 °F | 1.12 in. |
| March | 22.7 °F | 42.9 °F | 1.84 in. |
| April | 34.8 °F | 56.8 °F | 3.75 in. |
| May | 46.7 °F | 69.3 °F | 4.65 in. |
| June | 56.8 °F | 78.9 °F | 5.4 in. |
| July | 60.7 °F | 82.6 °F | 4.23 in. |
| August | 58.5 °F | 80.7 °F | 4.31 in. |
| September | 50.0 °F | 73.0 °F | 3.8 in. |
| October | 38.0 °F | 59.6 °F | 2.66 in. |
| November | 26.6 °F | 44.1 °F | 1.79 in. |
| December | 15.1 °F | 31.1 °F | 1.45 in. |
| Annual | 35.7 °F | 56.3 °F | 36.11 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |