Shannon, Quebec climate data is summarized below. Average annual temperatures range from 31 °F (low) to 47.9 °F (high). Annual precipitation averages 39.9 Inches. Shannon 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 | -27 °F | -21.7 °F | 0 in. |
| February | -26.5 °F | -21.2 °F | 0 in. |
| March | -23.5 °F | -18.2 °F | 330.2 in. |
| April | -18.9 °F | -13.7 °F | 1727.2 in. |
| May | -14.9 °F | -8.7 °F | 2565.4 in. |
| June | -11.8 °F | -6 °F | 3454.4 in. |
| July | -10.3 °F | -4.6 °F | 4495.8 in. |
| August | -10.7 °F | -5.1 °F | 4089.4 in. |
| September | -13.4 °F | -7.7 °F | 3378.2 in. |
| October | -16.3 °F | -11.8 °F | 3479.8 in. |
| November | -19.6 °F | -15.8 °F | 2006.6 in. |
| December | -24.1 °F | -20 °F | 228.6 in. |
| Annual | 31 °F | 47.9 °F | 39.92 in. |
| 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 : -25°F to -20°F |
| Current Drought Conditions | Normal |