Vallée-Jonction, Quebec climate data is summarized below. Average annual temperatures range from -0.1 °C (low) to 9.6 °C (high). Annual precipitation averages 881 Millimeters. Vallée-Jonction is located in USDA Plant Hardiness Zone 4b. 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 | -15.34 °C | -6 °C | 0 mm |
| February | -14.72 °C | -5.28 °C | 0 mm |
| March | -9.26 °C | 0.45 °C | 1 mm |
| April | -1.51 °C | 8.39 °C | 63 mm |
| May | 5.37 °C | 16.98 °C | 111 mm |
| June | 10.59 °C | 21.49 °C | 133 mm |
| July | 13.59 °C | 24.17 °C | 160 mm |
| August | 12.81 °C | 23.14 °C | 142 mm |
| September | 8.26 °C | 18.85 °C | 102 mm |
| October | 2.83 °C | 11.41 °C | 102 mm |
| November | -3.1 °C | 4.57 °C | 67 mm |
| December | -10.85 °C | -3.27 °C | 0 mm |
| Annual | -0.1 °C | 9.6 °C | 881 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |