Ingleside, Ontario climate data is summarized below. Average annual temperatures range from 1.8 °C (low) to 12.5 °C (high). Annual precipitation averages 597 Millimeters. Ingleside is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.35 °C | -3.63 °C | 0 mm |
| February | -13.38 °C | -3.21 °C | 4 mm |
| March | -7.04 °C | 3.6 °C | 22 mm |
| April | 1.24 °C | 12.57 °C | 51 mm |
| May | 7.58 °C | 20.17 °C | 66 mm |
| June | 12.62 °C | 24.33 °C | 83 mm |
| July | 15.14 °C | 27 °C | 109 mm |
| August | 14.23 °C | 26.12 °C | 82 mm |
| September | 9.59 °C | 21.72 °C | 66 mm |
| October | 4.41 °C | 14.29 °C | 66 mm |
| November | -1.51 °C | 7.23 °C | 34 mm |
| December | -8.23 °C | -0.81 °C | 14 mm |
| Annual | 1.8 °C | 12.5 °C | 597 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |