Dartmouth (NS) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Dartmouth, Nova Scotia, Canada. This average is based on long-term data collected between 1990 and 2020. Let's now guide you through the details for a complete overview.

Dartmouth is known for its substantial rain/snowfall, with annual precipitation reaching 1363 mm (54 in).

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Despite minor fluctuations, Dartmouth enjoys fairly consistent precipitation throughout the year. In December, you can expect around 142 mm (5.6 in) of precipitation, while in May, Dartmouth receives about 90 mm (3.5 in).

December, the wettest month, has a maximum daytime temperature of 5°C (41°F). The city receives 108 hours of sunshine in this period. During the driest month May you can expect a temperature of 15°C (59°F). For more detailed insights into the city's temperatures, visit our Dartmouth Temperature page.

Dartmouth's average annual precipitation is 1363 mm (54 in). Let's compare this to some popular worldwide tourist destinations:

In Barcelona, Spain, the average annual precipitation is 644 mm (25 in), evenly distributed across the year with no extreme wet or dry seasons.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

Climate change is affecting precipitation patterns worldwide, including Dartmouth (NS):

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

For more detailed information about Dartmouth (NS)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Dartmouth (NS) Climate page.