Charlestown Weather & Climate: Best Time to Visit

In Charlestown, seasonal changes bring about a moderate variation in temperatures. Typically, average maximum daytime temperatures range from a pleasant 20°C (68°F) in July to a chilly 10°C (50°F) in the coolest month, February.

Nights vary from 14°C (57°F) in July to around 5°C (41°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Charlestown experiences significant rainfall throughout the year, averaging 1005 mm (40 in) of precipitation annually. Precipitation levels in Charlestown remain relatively steady throughout the year. December has the most rain, with 103 mm (4.1 in) over 21 days. In the driest month September, this drops slightly to 69 mm (2.7 in), making the city's climate fairly predictable. For more details, please visit our Charlestown Precipitation page.

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

The average number of days each month with precipitation

For those who appreciate different seasons, Charlestown serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 7.4 hours of sunshine daily, and embrace the darker days in December, offering only 2.2 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine