Dartmouth, Nova Scotia Weather by Month and Climate Averages

How much rain does Dartmouth get?

Dartmouth gets 1353 mm of precipitation in an average year, spread over about 161 days with measurable rain. That is more rainy days than 81% of Canada.

December is the wettest month, with 176 mm. July is the driest, with 75 mm. December has the most rainy days, about 17.

The longest dry spell in the last five years lasted 11 days, to October 13, 2021.

Dartmouth weather by month

Dartmouth weather in January

In January, Dartmouth averages a high of 1°C and a low of -7°C. It gets 112 mm of precipitation over about 15 rainy days. The sun is out about 23% of daylight hours. The January record high is 13°C (2018) and the record low is -21°C (2009).

Dartmouth weather in February

In February, Dartmouth averages a high of 1°C and a low of -7°C. It gets 115 mm of precipitation over about 13 rainy days. The sun is out about 32% of daylight hours. The February record high is 14°C (2023) and the record low is -24°C (2023).

Dartmouth weather in March

In March, Dartmouth averages a high of 4°C and a low of -4°C. It gets 95 mm of precipitation over about 14 rainy days. The sun is out about 32% of daylight hours. The March record high is 28°C (2012) and the record low is -18°C (2017).

Dartmouth weather in April

In April, Dartmouth averages a high of 9°C and a low of 1°C. It gets 112 mm of precipitation over about 14 rainy days. The sun is out about 36% of daylight hours. The April record high is 24°C (2009) and the record low is -8°C (2016).

Dartmouth weather in May

In May, Dartmouth averages a high of 14°C and a low of 6°C. It gets 91 mm of precipitation over about 15 rainy days. The sun is out about 36% of daylight hours. The May record high is 29°C (2009) and the record low is -1°C (2016).

Dartmouth weather in June

In June, Dartmouth averages a high of 19°C and a low of 10°C. It gets 113 mm of precipitation over about 14 rainy days. The sun is out about 32% of daylight hours. The June record high is 33°C (2023) and the record low is 0°C (2018). June is one of the most comfortable months to visit.

Dartmouth weather in July

In July, Dartmouth averages a high of 23°C and a low of 14°C. It gets 75 mm of precipitation over about 12 rainy days. The sun is out about 30% of daylight hours. The July record high is 33°C (2026) and the record low is 8°C (2009). July is one of the most comfortable months to visit.

Dartmouth weather in August

In August, Dartmouth averages a high of 24°C and a low of 15°C. It gets 84 mm of precipitation over about 11 rainy days. The sun is out about 35% of daylight hours. The August record high is 33°C (2010) and the record low is 7°C (2014). August is one of the most comfortable months to visit.

Dartmouth weather in September

In September, Dartmouth averages a high of 21°C and a low of 12°C. It gets 98 mm of precipitation over about 10 rainy days. The sun is out about 40% of daylight hours. The September record high is 34°C (2010) and the record low is 2°C (2018). September is one of the most comfortable months to visit.

Dartmouth weather in October

In October, Dartmouth averages a high of 15°C and a low of 7°C. It gets 148 mm of precipitation over about 13 rainy days. The sun is out about 38% of daylight hours. The October record high is 28°C (2025) and the record low is -3°C (2013).

Dartmouth weather in November

In November, Dartmouth averages a high of 9°C and a low of 2°C. It gets 136 mm of precipitation over about 12 rainy days. The sun is out about 33% of daylight hours. The November record high is 21°C (2022) and the record low is -11°C (2018).

Dartmouth weather in December

In December, Dartmouth averages a high of 4°C and a low of -3°C. It gets 176 mm of precipitation over about 17 rainy days. The sun is out about 29% of daylight hours. The December record high is 15°C (2021) and the record low is -16°C (2013).

Sunshine, humidity and wind in Dartmouth

September is the sunniest month in Dartmouth, with sunshine about 40% of daylight hours. January is the cloudiest, at 23%. Over the year the sun shines about 33% of daylight hours. Dartmouth is cloudier than 74% of Canada.

Humidity peaks in July at 82% and is lowest in April at 70%.

First and last freeze in Dartmouth

The first fall freeze in Dartmouth typically comes around November 5, and the last spring freeze around April 25. That leaves a frost-free growing season of about 194 days.

Dartmouth weather records

The hottest temperature on record at the Dartmouth station is 34°C, on September 1, 2010. The coldest is -24°C, on February 4, 2023.

The wettest day on record brought 121 mm of rain, on August 5, 2023.

The best time to visit Dartmouth

The most comfortable time to visit is typically June to September, when daytime highs sit near 22°C.

Winter (December–February) is cold, with average highs around 2°C and lows near -6°C.

Spring (March–May) is chilly, with average highs around 9°C and lows near 1°C.

Summer (June–August) is warm, with average highs around 22°C and lows near 13°C. It can feel humid.

Autumn (September–November) is mild, with average highs around 15°C and lows near 7°C.

Dartmouth climate questions

How much rain does Dartmouth get?

Dartmouth gets 1353 mm of precipitation in an average year, over about 161 rainy days.

What is the wettest month in Dartmouth?

December is the wettest month in Dartmouth, with 176 mm. July is the driest, with 75 mm.

How many rainy days does Dartmouth have a year?

Dartmouth has about 161 days with measurable rain in an average year. December has the most, about 17.

What is the hottest month in Dartmouth?

August is the warmest month in Dartmouth, with an average high of 24°C.

What is the coldest month in Dartmouth?

January is the coldest month in Dartmouth, with an average low of -7°C.

What is the record high temperature in Dartmouth?

The record high at the Dartmouth station is 34°C, set on September 1, 2010. The record low is -24°C, on February 4, 2023.

What is the sunniest month in Dartmouth?

September is the sunniest month in Dartmouth, with sunshine about 40% of daylight hours. January is the cloudiest.

When is the first frost in Dartmouth?

The first fall freeze in Dartmouth typically comes around November 5. The last spring freeze is around April 25.

What is the best time to visit Dartmouth?

The most comfortable time to visit is typically June to September, when daytime highs sit near 22°C.