Shannon, Quebec climate data is summarized below. Average annual temperatures range from -0.5 °C (low) to 8.8 °C (high). Annual precipitation averages 1014 Millimeters. 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 | -16.54 °C | -7.11 °C | 0 mm |
| February | -15.67 °C | -6.17 °C | 0 mm |
| March | -10.3 °C | -0.69 °C | 13 mm |
| April | -2.02 °C | 7.32 °C | 68 mm |
| May | 5.22 °C | 16.39 °C | 101 mm |
| June | 10.71 °C | 21.13 °C | 136 mm |
| July | 13.41 °C | 23.7 °C | 177 mm |
| August | 12.8 °C | 22.91 °C | 161 mm |
| September | 7.96 °C | 18.16 °C | 133 mm |
| October | 2.66 °C | 10.72 °C | 137 mm |
| November | -3.19 °C | 3.62 °C | 79 mm |
| December | -11.46 °C | -4.03 °C | 9 mm |
| Annual | -0.5 °C | 8.8 °C | 1014 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 |