Aston-Jonction, Quebec climate data is summarized below. Average annual temperatures range from 33.5 °F (low) to 51.7 °F (high). Annual precipitation averages 11.8 Inches. 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 | -26 °F | -20.7 °F | 0 in. |
| February | -25.9 °F | -20.3 °F | 0 in. |
| March | -22.7 °F | -16.9 °F | 177.8 in. |
| April | -17.7 °F | -11.8 °F | 558.8 in. |
| May | -14.1 °F | -7.3 °F | 635 in. |
| June | -11.2 °F | -4.9 °F | 1066.8 in. |
| July | -9.6 °F | -3.6 °F | 1803.4 in. |
| August | -10.1 °F | -4.1 °F | 1219.2 in. |
| September | -12.8 °F | -6.5 °F | 787.4 in. |
| October | -15.8 °F | -10.7 °F | 812.8 in. |
| November | -19 °F | -14.6 °F | 406.4 in. |
| December | -23.2 °F | -19.1 °F | 152.4 in. |
| Annual | 33.5 °F | 51.7 °F | 11.82 in. |
| 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 : -25°F to -20°F |
| Current Drought Conditions | Normal |