Aston-Jonction, Quebec climate data is summarized below. Average annual temperatures range from 0.8 °C (low) to 11 °C (high). Annual precipitation averages 300 Millimeters. Aston-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.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.84 °C | -5.21 °C | 0 mm |
| February | -14.58 °C | -4.55 °C | 0 mm |
| March | -8.86 °C | 1.53 °C | 7 mm |
| April | 0.08 °C | 10.85 °C | 22 mm |
| May | 6.71 °C | 18.82 °C | 25 mm |
| June | 11.85 °C | 23.16 °C | 42 mm |
| July | 14.74 °C | 25.59 °C | 71 mm |
| August | 13.86 °C | 24.69 °C | 48 mm |
| September | 9 °C | 20.23 °C | 31 mm |
| October | 3.65 °C | 12.77 °C | 32 mm |
| November | -2.17 °C | 5.79 °C | 16 mm |
| December | -9.8 °C | -2.31 °C | 6 mm |
| Annual | 0.8 °C | 11 °C | 300 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| 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 |