Ridgetown, Ontario climate data is summarized below. Average annual temperatures range from 4.7 °C (low) to 13.6 °C (high). Annual precipitation averages 754 Millimeters. Ridgetown 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 | -7.77 °C | -0.96 °C | 22 mm |
| February | -9.03 °C | -1.29 °C | 15 mm |
| March | -2.68 °C | 5.84 °C | 52 mm |
| April | 2.85 °C | 12.95 °C | 71 mm |
| May | 9.14 °C | 19.66 °C | 86 mm |
| June | 14.48 °C | 24.79 °C | 84 mm |
| July | 16.79 °C | 26.82 °C | 110 mm |
| August | 16.12 °C | 26.05 °C | 75 mm |
| September | 11.93 °C | 22.1 °C | 79 mm |
| October | 6.88 °C | 15.7 °C | 63 mm |
| November | 1.28 °C | 8.71 °C | 55 mm |
| December | -3.46 °C | 2.46 °C | 42 mm |
| Annual | 4.7 °C | 13.6 °C | 754 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |