Deseronto, Ontario climate data is summarized below. Average annual temperatures range from 3 °C (low) to 13.3 °C (high). Annual precipitation averages 684 Millimeters. Deseronto 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.64 °C | -1.86 °C | 13 mm |
| February | -11.62 °C | -2 °C | 8 mm |
| March | -5.15 °C | 4.96 °C | 42 mm |
| April | 2.01 °C | 13.02 °C | 67 mm |
| May | 8.34 °C | 20.65 °C | 74 mm |
| June | 13.45 °C | 24.95 °C | 94 mm |
| July | 15.87 °C | 27.45 °C | 109 mm |
| August | 15.08 °C | 26.46 °C | 89 mm |
| September | 10.31 °C | 21.96 °C | 54 mm |
| October | 5.15 °C | 14.8 °C | 63 mm |
| November | -0.7 °C | 8.07 °C | 41 mm |
| December | -6.39 °C | 0.99 °C | 30 mm |
| Annual | 3 °C | 13.3 °C | 684 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |