Parry Sound, Ontario climate data is summarized below. Average annual temperatures range from 2.5 °C (low) to 10.1 °C (high). Annual precipitation averages 747 Millimeters. Parry Sound is located in USDA Plant Hardiness Zone 5b. 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 | -12.06 °C | -3.5 °C | 0 mm |
| February | -13.29 °C | -4.05 °C | 0 mm |
| March | -6.91 °C | 1.59 °C | 30 mm |
| April | 0.06 °C | 7.89 °C | 74 mm |
| May | 6.4 °C | 14.86 °C | 91 mm |
| June | 12.23 °C | 19.54 °C | 85 mm |
| July | 15.9 °C | 22.76 °C | 77 mm |
| August | 15.88 °C | 22.95 °C | 83 mm |
| September | 11.64 °C | 19.34 °C | 89 mm |
| October | 6.36 °C | 13.01 °C | 119 mm |
| November | 0.25 °C | 6.65 °C | 75 mm |
| December | -6.63 °C | -0.19 °C | 24 mm |
| Annual | 2.5 °C | 10.1 °C | 747 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 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |