Dartmouth, Nova Scotia climate data is summarized below. Average annual temperatures range from 38.2 °F (low) to 53.9 °F (high). Annual precipitation averages 54.2 Inches. Dartmouth is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -22.1 °F | -17.5 °F | 1803.4 in. |
| February | -22 °F | -17.4 °F | 2209.8 in. |
| March | -20.3 °F | -15.4 °F | 2108.2 in. |
| April | -17.3 °F | -12.4 °F | 2921 in. |
| May | -14.6 °F | -9.3 °F | 2489.2 in. |
| June | -12 °F | -6.9 °F | 3225.8 in. |
| July | -9.4 °F | -4.3 °F | 2082.8 in. |
| August | -9.4 °F | -4.2 °F | 2743.2 in. |
| September | -11.6 °F | -6.4 °F | 3429 in. |
| October | -14.3 °F | -9.6 °F | 3987.8 in. |
| November | -17.1 °F | -12.8 °F | 3759.2 in. |
| December | -20 °F | -15.8 °F | 4191 in. |
| Annual | 38.2 °F | 53.9 °F | 54.19 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |