Pelham, Ontario climate data is summarized below. Average annual temperatures range from 40.6 °F (low) to 56 °F (high). Annual precipitation averages 32.2 Inches. Pelham is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -21.9 °F | -18.1 °F | 736.6 in. |
| February | -22.7 °F | -18.6 °F | 660.4 in. |
| March | -19.5 °F | -14.7 °F | 1524 in. |
| April | -16.3 °F | -10.9 °F | 2082.8 in. |
| May | -12.9 °F | -6.9 °F | 2082.8 in. |
| June | -9.8 °F | -4.3 °F | 2286 in. |
| July | -8.3 °F | -3 °F | 2108.2 in. |
| August | -8.6 °F | -3.4 °F | 1955.8 in. |
| September | -10.9 °F | -5.7 °F | 2057.4 in. |
| October | -13.9 °F | -9.4 °F | 2159 in. |
| November | -17.1 °F | -13 °F | 1600.2 in. |
| December | -19.7 °F | -16.4 °F | 1498.6 in. |
| Annual | 40.6 °F | 56 °F | 32.16 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |