Dartmouth Weather & Climate: Best Time to Visit

The climate in Dartmouth experiences moderate temperature changes, with mild shifts between seasons. Average maximum daytime temperatures range from a pleasant 20°C (68°F) in August, the warmest time of the year, to a chilly 10°C (50°F) during cooler months like February.

At night, you can expect temperatures ranging from 15°C (59°F) in August to around 5°C (41°F) during February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Dartmouth receives mid-range precipitation levels, with 912 mm (36 in) annually. While rainfall varies throughout the year, each season offers its own charm. November brings wetter days averaging 104 mm (4.1 in) of precipitation, spread over 18 rainy days.

In contrast, the driest month July experiences a drier climate, with about 56 mm (2.2 in) of rainfall spread across 10 rainy days. For more details, please visit our Dartmouth Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Dartmouth. While May receives considerable daily sunshine with up to 7.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.8 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The city experiences its highest humidity in January, reaching 86%. In May, the humidity drops to its lowest level at 79%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year