Charlottetown, Newfoundland and Labrador climate data is summarized below. Average annual temperatures range from 28.4 °F (low) to 39.3 °F (high). Annual precipitation averages 22.1 Inches. 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 | -25.9 °F | -22 °F | 330.2 in. |
| February | -25.8 °F | -21.6 °F | 254 in. |
| March | -23.6 °F | -20 °F | 406.4 in. |
| April | -20.4 °F | -17.7 °F | 558.8 in. |
| May | -18 °F | -14.9 °F | 1422.4 in. |
| June | -15.1 °F | -11.4 °F | 1549.4 in. |
| July | -12.6 °F | -8.5 °F | 1879.6 in. |
| August | -12.1 °F | -8.3 °F | 1473.2 in. |
| September | -14.2 °F | -10.8 °F | 1803.4 in. |
| October | -16.6 °F | -14.1 °F | 2336.8 in. |
| November | -19.5 °F | -17.2 °F | 1473.2 in. |
| December | -23.1 °F | -20.1 °F | 787.4 in. |
| Annual | 28.4 °F | 39.3 °F | 22.11 in. |
| 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°F to -35°F |
| Current Drought Conditions | Normal |