Charlottetown, Prince Edward Island climate data is summarized below. Average annual temperatures range from 2.6 °C (low) to 10.5 °C (high). Annual precipitation averages 943 Millimeters. Charlottetown is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.98 °C | -2.56 °C | 18 mm |
| February | -9.9 °C | -2.38 °C | 7 mm |
| March | -6.87 °C | 0.83 °C | 31 mm |
| April | -0.55 °C | 7.58 °C | 63 mm |
| May | 5.08 °C | 14.1 °C | 87 mm |
| June | 10.23 °C | 19.23 °C | 101 mm |
| July | 15.31 °C | 24.29 °C | 105 mm |
| August | 15.21 °C | 23.7 °C | 124 mm |
| September | 10.97 °C | 19.29 °C | 111 mm |
| October | 5.83 °C | 13.12 °C | 103 mm |
| November | 0.69 °C | 7.22 °C | 101 mm |
| December | -5.24 °C | 1.13 °C | 92 mm |
| Annual | 2.6 °C | 10.5 °C | 943 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |