Roberval, Quebec climate data is summarized below. Average annual temperatures range from -1.5 °C (low) to 7.2 °C (high). Annual precipitation averages 728 Millimeters. Roberval is located in USDA Plant Hardiness Zone 3b. 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 | -19.37 °C | -10.23 °C | 0 mm |
| February | -18.26 °C | -9.01 °C | 0 mm |
| March | -12.46 °C | -2.68 °C | 0 mm |
| April | -2.96 °C | 5.92 °C | 45 mm |
| May | 4.48 °C | 15.23 °C | 86 mm |
| June | 10.45 °C | 20.16 °C | 116 mm |
| July | 13.68 °C | 22.29 °C | 140 mm |
| August | 13.22 °C | 21.63 °C | 118 mm |
| September | 8.43 °C | 17.05 °C | 98 mm |
| October | 2.76 °C | 9.77 °C | 91 mm |
| November | -3.49 °C | 2.71 °C | 34 mm |
| December | -13.76 °C | -6.39 °C | 0 mm |
| Annual | -1.5 °C | 7.2 °C | 728 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Normal |