Radisson, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.6 °C (low) to 11.5 °C (high). Annual precipitation averages 877.3 Millimeters. Radisson 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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.7 °C | -5.7 °C | 27.69 mm |
| February | -15.4 °C | -2.7 °C | 27.69 mm |
| March | -8.6 °C | 4.1 °C | 42.93 mm |
| April | -1.2 °C | 11.6 °C | 76.2 mm |
| May | 5.5 °C | 19.2 °C | 101.6 mm |
| June | 11.1 °C | 24.1 °C | 118.11 mm |
| July | 13.5 °C | 26.3 °C | 109.98 mm |
| August | 12.2 °C | 25.1 °C | 100.84 mm |
| September | 8.1 °C | 20.9 °C | 99.57 mm |
| October | 1.6 °C | 13.1 °C | 87.63 mm |
| November | -5.1 °C | 4.3 °C | 48.51 mm |
| December | -12.1 °C | -2.8 °C | 36.58 mm |
| Annual | -0.6 °C | 11.5 °C | 877.33 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |