Kasson, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 53.6 °F (high). Annual precipitation averages 34.8 Inches. Kasson 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 | 6.1 °F | 22.2 °F | 1.03 in. |
| February | 9.7 °F | 26.7 °F | 1.0 in. |
| March | 22.0 °F | 39.0 °F | 1.94 in. |
| April | 34.4 °F | 54.5 °F | 3.39 in. |
| May | 46.8 °F | 67.0 °F | 4.37 in. |
| June | 57.4 °F | 76.9 °F | 5.54 in. |
| July | 60.7 °F | 80.2 °F | 4.53 in. |
| August | 58.1 °F | 78.0 °F | 4.37 in. |
| September | 49.9 °F | 71.6 °F | 3.53 in. |
| October | 37.3 °F | 57.9 °F | 2.22 in. |
| November | 25.2 °F | 41.6 °F | 1.58 in. |
| December | 13.3 °F | 28.0 °F | 1.3 in. |
| Annual | 35.1 °F | 53.6 °F | 34.8 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 |