Radisson, Quebec climate data is summarized below. Average annual temperatures range from -7.3 °C (low) to 2.7 °C (high). Annual precipitation averages 651 Millimeters. Radisson is located in USDA Plant Hardiness Zone 1a. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -26.76 °C | -16.74 °C | 0 mm |
| February | -29.09 °C | -15.5 °C | 0 mm |
| March | -24.08 °C | -8.56 °C | 0 mm |
| April | -11.51 °C | 0.34 °C | 12 mm |
| May | -1.69 °C | 9.14 °C | 57 mm |
| June | 6.1 °C | 18.5 °C | 74 mm |
| July | 9.63 °C | 20.02 °C | 130 mm |
| August | 9.25 °C | 18.51 °C | 149 mm |
| September | 5.2 °C | 12.95 °C | 120 mm |
| October | 0.88 °C | 6.37 °C | 79 mm |
| November | -6.14 °C | -1.31 °C | 30 mm |
| December | -19.16 °C | -11.38 °C | 0 mm |
| Annual | -7.3 °C | 2.7 °C | 651 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 1a : |
| Current Drought Conditions | Normal |