Charlottetown, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from -2 °C (low) to 4 °C (high). Annual precipitation averages 562 Millimeters. Charlottetown is located in USDA Plant Hardiness Zone 3a. 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 | -14.63 °C | -7.54 °C | 13 mm |
| February | -14.48 °C | -6.87 °C | 10 mm |
| March | -10.43 °C | -4.07 °C | 16 mm |
| April | -4.79 °C | 0.14 °C | 22 mm |
| May | -0.35 °C | 5.25 °C | 56 mm |
| June | 4.78 °C | 11.56 °C | 61 mm |
| July | 9.36 °C | 16.63 °C | 74 mm |
| August | 10.2 °C | 17.14 °C | 58 mm |
| September | 6.49 °C | 12.61 °C | 71 mm |
| October | 2.21 °C | 6.56 °C | 92 mm |
| November | -3.02 °C | 1.08 °C | 58 mm |
| December | -9.56 °C | -4.18 °C | 31 mm |
| Annual | -2 °C | 4 °C | 562 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 3a : -40°C to -37.2°C |
| Current Drought Conditions | Normal |