Knapp, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.3 °F (low) to 54.2 °F (high). Annual precipitation averages 34.3 Inches. Knapp is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.2 °F | 22.9 °F | 1.01 in. |
| February | 8.3 °F | 27.8 °F | 1.04 in. |
| March | 20.5 °F | 40.2 °F | 1.87 in. |
| April | 33.3 °F | 55.1 °F | 3.05 in. |
| May | 45.7 °F | 67.8 °F | 4.21 in. |
| June | 56.0 °F | 77.0 °F | 5.1 in. |
| July | 60.1 °F | 81.2 °F | 4.05 in. |
| August | 57.8 °F | 79.3 °F | 4.39 in. |
| September | 49.6 °F | 71.8 °F | 3.6 in. |
| October | 37.1 °F | 57.7 °F | 2.78 in. |
| November | 25.0 °F | 41.5 °F | 1.78 in. |
| December | 12.6 °F | 28.1 °F | 1.39 in. |
| Annual | 34.3 °F | 54.2 °F | 34.27 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |