Dover, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 1.4 °C (low) to 7.9 °C (high). Annual precipitation averages 881 Millimeters. Dover is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.14 °C | -2.04 °C | 37 mm |
| February | -8.92 °C | -2.64 °C | 37 mm |
| March | -6.96 °C | -1.15 °C | 35 mm |
| April | -2.24 °C | 3.28 °C | 53 mm |
| May | 2.06 °C | 9.13 °C | 75 mm |
| June | 6.76 °C | 14.36 °C | 75 mm |
| July | 11.88 °C | 20.3 °C | 84 mm |
| August | 12.42 °C | 20.22 °C | 94 mm |
| September | 8.96 °C | 16.34 °C | 104 mm |
| October | 4.89 °C | 10.41 °C | 111 mm |
| November | 0.51 °C | 5.54 °C | 104 mm |
| December | -4.28 °C | 0.84 °C | 72 mm |
| Annual | 1.4 °C | 7.9 °C | 881 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |