Owen Sound, Ontario climate data is summarized below. Average annual temperatures range from 2.9 °C (low) to 11.8 °C (high). Annual precipitation averages 683 Millimeters. Owen Sound 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 | -9.21 °C | -2.35 °C | 0 mm |
| February | -10.93 °C | -3.08 °C | 0 mm |
| March | -5.31 °C | 3.3 °C | 30 mm |
| April | 0.97 °C | 10.8 °C | 72 mm |
| May | 6.77 °C | 17.93 °C | 90 mm |
| June | 11.89 °C | 22.81 °C | 88 mm |
| July | 14.67 °C | 25.16 °C | 61 mm |
| August | 14.38 °C | 24.73 °C | 85 mm |
| September | 10.56 °C | 20.61 °C | 84 mm |
| October | 5.92 °C | 13.93 °C | 103 mm |
| November | 0.23 °C | 7.28 °C | 61 mm |
| December | -5.2 °C | 0.53 °C | 9 mm |
| Annual | 2.9 °C | 11.8 °C | 683 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |