Ingersoll, Ontario climate data is summarized below. Average annual temperatures range from 3.5 °C (low) to 13.1 °C (high). Annual precipitation averages 466 Millimeters. Ingersoll is located in USDA Plant Hardiness Zone 6a. 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 | -8.79 °C | -1.67 °C | 7 mm |
| February | -10.09 °C | -2.1 °C | 0 mm |
| March | -4.02 °C | 4.94 °C | 25 mm |
| April | 1.99 °C | 12.81 °C | 32 mm |
| May | 8.27 °C | 19.91 °C | 49 mm |
| June | 13.38 °C | 24.58 °C | 71 mm |
| July | 15.45 °C | 26.71 °C | 80 mm |
| August | 14.84 °C | 25.94 °C | 90 mm |
| September | 10.66 °C | 22.05 °C | 57 mm |
| October | 5.42 °C | 15.03 °C | 29 mm |
| November | -0.06 °C | 7.86 °C | 18 mm |
| December | -4.56 °C | 1.42 °C | 8 mm |
| Annual | 3.5 °C | 13.1 °C | 466 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |