Pelham, Ontario climate data is summarized below. Average annual temperatures range from 4.8 °C (low) to 13.3 °C (high). Annual precipitation averages 817 Millimeters. 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 | -7.33 °C | -0.66 °C | 29 mm |
| February | -8.79 °C | -1.41 °C | 26 mm |
| March | -3.13 °C | 5.46 °C | 60 mm |
| April | 2.66 °C | 12.34 °C | 82 mm |
| May | 8.82 °C | 19.56 °C | 82 mm |
| June | 14.34 °C | 24.2 °C | 90 mm |
| July | 17.13 °C | 26.54 °C | 83 mm |
| August | 16.61 °C | 25.92 °C | 77 mm |
| September | 12.36 °C | 21.69 °C | 81 mm |
| October | 6.98 °C | 15.03 °C | 85 mm |
| November | 1.27 °C | 8.59 °C | 63 mm |
| December | -3.38 °C | 2.55 °C | 59 mm |
| Annual | 4.8 °C | 13.3 °C | 817 mm |
| 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 : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |