Port Carling, Ontario climate data is summarized below. Average annual temperatures range from 32.9 °F (low) to 51.4 °F (high). Annual precipitation averages 27.6 Inches. Port Carling is located in USDA Plant Hardiness Zone 5a. 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 | -25.4 °F | -20.1 °F | 0 in. |
| February | -26.3 °F | -20.2 °F | 0 in. |
| March | -22.5 °F | -16.6 °F | 787.4 in. |
| April | -18.5 °F | -12.2 °F | 1701.8 in. |
| May | -14.9 °F | -8.1 °F | 1930.4 in. |
| June | -11.8 °F | -5.6 °F | 2184.4 in. |
| July | -10.3 °F | -4.1 °F | 2235.2 in. |
| August | -10.5 °F | -4.5 °F | 2209.8 in. |
| September | -12.8 °F | -6.8 °F | 2082.8 in. |
| October | -15.5 °F | -10.6 °F | 2768.6 in. |
| November | -18.7 °F | -14.3 °F | 1600.2 in. |
| December | -22.7 °F | -18.5 °F | 304.8 in. |
| Annual | 32.9 °F | 51.4 °F | 27.6 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 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |