Port Dover, Ontario climate data is summarized below. Average annual temperatures range from 4.8 °C (low) to 13.2 °C (high). Annual precipitation averages 522 Millimeters. Port Dover is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.44 °C | -0.54 °C | 16 mm |
| February | -9.05 °C | -1.25 °C | 12 mm |
| March | -2.98 °C | 5.34 °C | 37 mm |
| April | 2.42 °C | 11.73 °C | 49 mm |
| May | 8.57 °C | 18.48 °C | 61 mm |
| June | 14.23 °C | 23.52 °C | 59 mm |
| July | 16.77 °C | 26.2 °C | 72 mm |
| August | 16.36 °C | 25.62 °C | 65 mm |
| September | 12.59 °C | 21.75 °C | 50 mm |
| October | 7.34 °C | 15.38 °C | 43 mm |
| November | 1.69 °C | 8.89 °C | 32 mm |
| December | -2.87 °C | 2.96 °C | 26 mm |
| Annual | 4.8 °C | 13.2 °C | 522 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |