Delson, Quebec climate data is summarized below. Average annual temperatures range from 3.4 °C (low) to 12.4 °C (high). Annual precipitation averages 943 Millimeters. Delson is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.63 °C | -3.86 °C | 18 mm |
| February | -11.33 °C | -3.5 °C | 23 mm |
| March | -5.22 °C | 3.48 °C | 64 mm |
| April | 2.39 °C | 12.55 °C | 112 mm |
| May | 9.17 °C | 20.14 °C | 96 mm |
| June | 14.39 °C | 24.57 °C | 97 mm |
| July | 17.07 °C | 27.27 °C | 126 mm |
| August | 16.29 °C | 26.36 °C | 87 mm |
| September | 11.48 °C | 21.74 °C | 71 mm |
| October | 5.74 °C | 14 °C | 115 mm |
| November | -0.39 °C | 6.96 °C | 77 mm |
| December | -7.18 °C | -0.99 °C | 57 mm |
| Annual | 3.4 °C | 12.4 °C | 943 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |