Parry Sound, Ontario climate data is summarized below. Average annual temperatures range from 36.5 °F (low) to 50.1 °F (high). Annual precipitation averages 29.4 Inches. 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 | -24.5 °F | -19.7 °F | 0 in. |
| February | -25.2 °F | -20 °F | 0 in. |
| March | -21.6 °F | -16.9 °F | 762 in. |
| April | -17.7 °F | -13.4 °F | 1879.6 in. |
| May | -14.2 °F | -9.5 °F | 2311.4 in. |
| June | -11 °F | -6.9 °F | 2159 in. |
| July | -8.9 °F | -5.1 °F | 1955.8 in. |
| August | -9 °F | -5 °F | 2108.2 in. |
| September | -11.3 °F | -7 °F | 2260.6 in. |
| October | -14.2 °F | -10.6 °F | 3022.6 in. |
| November | -17.6 °F | -14.1 °F | 1905 in. |
| December | -21.5 °F | -17.9 °F | 609.6 in. |
| Annual | 36.5 °F | 50.1 °F | 29.4 in. |
| 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 : -15°F to -10°F |
| Current Drought Conditions | Normal |