Belmont, Ontario climate data is summarized below. Average annual temperatures range from 4.2 °C (low) to 13.6 °C (high). Annual precipitation averages 501 Millimeters. Belmont is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.11 °C | -1.08 °C | 10 mm |
| February | -9.54 °C | -1.52 °C | 0 mm |
| March | -3.45 °C | 5.5 °C | 24 mm |
| April | 2.58 °C | 13.24 °C | 35 mm |
| May | 8.72 °C | 20.13 °C | 54 mm |
| June | 13.88 °C | 25.05 °C | 72 mm |
| July | 16.29 °C | 27.3 °C | 88 mm |
| August | 15.67 °C | 26.5 °C | 86 mm |
| September | 11.55 °C | 22.5 °C | 64 mm |
| October | 6.23 °C | 15.4 °C | 37 mm |
| November | 0.74 °C | 8.46 °C | 21 mm |
| December | -3.82 °C | 2.02 °C | 10 mm |
| Annual | 4.2 °C | 13.6 °C | 501 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |