Kasson, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.7 °C (low) to 12 °C (high). Annual precipitation averages 883.9 Millimeters. 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 | -14.4 °C | -5.4 °C | 26.16 mm |
| February | -12.4 °C | -2.9 °C | 25.4 mm |
| March | -5.6 °C | 3.9 °C | 49.28 mm |
| April | 1.3 °C | 12.5 °C | 86.11 mm |
| May | 8.2 °C | 19.4 °C | 111 mm |
| June | 14.1 °C | 24.9 °C | 140.72 mm |
| July | 15.9 °C | 26.8 °C | 115.06 mm |
| August | 14.5 °C | 25.6 °C | 111 mm |
| September | 9.9 °C | 22 °C | 89.66 mm |
| October | 2.9 °C | 14.4 °C | 56.39 mm |
| November | -3.8 °C | 5.3 °C | 40.13 mm |
| December | -10.4 °C | -2.2 °C | 33.02 mm |
| Annual | 1.7 °C | 12 °C | 883.93 mm |
| 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 : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |