Little Round Lake, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.1 °F (low) to 52.2 °F (high). Annual precipitation averages 34.2 Inches. Little Round Lake is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.2 °F | 21.1 °F | 1.04 in. |
| February | 3.4 °F | 26.6 °F | 1.04 in. |
| March | 15.4 °F | 38.7 °F | 1.64 in. |
| April | 28.7 °F | 52.6 °F | 2.97 in. |
| May | 40.8 °F | 66.0 °F | 4.0 in. |
| June | 50.7 °F | 75.0 °F | 4.47 in. |
| July | 55.4 °F | 79.3 °F | 4.32 in. |
| August | 53.1 °F | 76.9 °F | 4.08 in. |
| September | 46.1 °F | 69.4 °F | 3.95 in. |
| October | 34.4 °F | 54.8 °F | 3.44 in. |
| November | 22.7 °F | 39.4 °F | 1.87 in. |
| December | 9.8 °F | 26.3 °F | 1.41 in. |
| Annual | 30.1 °F | 52.2 °F | 34.23 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |