Delson, Quebec climate data is summarized below. Average annual temperatures range from 38.1 °F (low) to 54.3 °F (high). Annual precipitation averages 37.1 Inches. 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 | -24.2 °F | -19.9 °F | 457.2 in. |
| February | -24.1 °F | -19.7 °F | 584.2 in. |
| March | -20.7 °F | -15.8 °F | 1625.6 in. |
| April | -16.5 °F | -10.8 °F | 2844.8 in. |
| May | -12.7 °F | -6.6 °F | 2438.4 in. |
| June | -9.8 °F | -4.1 °F | 2463.8 in. |
| July | -8.3 °F | -2.6 °F | 3200.4 in. |
| August | -8.7 °F | -3.1 °F | 2209.8 in. |
| September | -11.4 °F | -5.7 °F | 1803.4 in. |
| October | -14.6 °F | -10 °F | 2921 in. |
| November | -18 °F | -13.9 °F | 1955.8 in. |
| December | -21.8 °F | -18.3 °F | 1447.8 in. |
| Annual | 38.1 °F | 54.3 °F | 37.14 in. |
| 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 : -10°F to -5°F |
| Current Drought Conditions | Normal |