Climate and monthly weather forecastCharlestown, RI

The climate of Charlestown

Charlestown, Rhode Island, USA, is characterized by a marine west coast climate, also known as warm summer climate according to the Köppen climate classification, symbolized as Cfb. This moderate climate is due to its geographical positioning on the southeastern coast of Rhode Island.

Throughout the year, Charlestown experiences moderate temperatures with an average high varying from 37.6°F (3.1°C) in January to 76.1°F (24.5°C) in August. Similarly, the average low fluctuates from 28.8°F (-1.8°C) in January to 68.2°F (20.1°C) in July and August. Relative humidity remains mostly constant throughout the year, hovering around 75% to 82%, with the highest values reported in the summer months.

Rainfall in Charlestown is evenly distributed across the year, with monthly values ranging from 1.69" (43mm) in September to 3.66" (93mm) in December. The number of rainy days per month peaks in July with 15.8 days and is at its lowest in February with 10.1 days.

Snowfall is not a common occurrence in Charlestown but is possible with an average of 1.61" (41mm) in January and 2.6" (66mm) in March. The months between April and November are usually free from snowfall.

The best time to visit Charlestown

As Charlestown enjoys moderate climate conditions throughout the year, the best period to visit depends mostly on the preferences of the visitor. For those who enjoy warm weather and long daylight hours, the summer months from June to August provide high temperatures and up to 15.1 daylight hours. These months also see the highest UV index values, reaching a maximum of 6.

The worst time to visit Charlestown

Conversely, travellers seeking to avoid cold weather should avoid visiting Charlestown during the winter. The months of December, January, and February witness the lowest temperatures with average lows of 35.6°F (2°C), 28.8°F (-1.8°C) and 29.3°F (-1.5°C) respectively. These months also offer less daylight, averaging between 9.2 to 10.6 hours.

Spring weather in Charlestown

The transition from winter to summer during the months of March, April, and May brings a notable change in Charlestown's weather. In March, the average high temperature is 42.8°F (6°C) which steadily increases to 51.3°F (10.7°C) in April and reaches 60.3°F (15.7°C) in May. Corresponding changes in the average low temperatures are also observed from 34.3°F (1.3°C) in March up to 51.8°F (11°C) in May. In spring, the city also experiences a progressive increase in daylight hours from 12 to 14.5 hours. Rainfall ranges from 3.07" (78mm) in April to 2.4" (61mm) in May.

Summer weather in Charlestown

Charlestown's summer from June through August is characterized by mild and comfortable weather. Average high temperatures hover around the 70s, ranging from 68.4°F (20.2°C) in June to a peak of 76.1°F (24.5°C) in August. Similarly, average low temperatures are within the interval from 60.3°F (15.7°C) to 68.2°F (20.1°C) across these months.

Autumn weather in Charlestown

During September, October, and November, known as Autumn, Charlestown witnesses a drop in average high temperatures starting from 70.5°F (21.4°C) in September down to 51.1°F (10.6°C) in November. Likewise, the average lows decrease from 61.7°F (16.5°C) in September to 43.2°F (6.2°C) in November. Autumn rainfall slightly rises from 1.69" (43mm) in September to 2.56" (65mm) in November.

Winter weather in Charlestown

Winter in Charlestown spans December through February. During this period, temperatures drop considerably with average highs ranging from 37.6°F (3.1°C) in January to 43.2°F (6.2°C) in December. Average low temperatures are quite chilly, varying from 28.8°F (-1.8°C) to 35.6°F (2°C). The region witnesses the year's peak rainfall in December, measuring 3.66" (93mm). Snowfall can also be expected during these months, particularly in January and March.

Weather in January

Relatively low temperatures dominate the weather scene in Charlestown, Rhode Island during January. As a winter month, conditions are often snow-based, which gives the city a picturesque appearance. A distinct decrease in daylight hours is observed throughout the month, adding a chilliness to the atmosphere. Weather in January »

Weather in February

February weather in Charlestown bears a close resemblance to the conditions of January, albeit with slightly less snowfall. The recorded average values for rainfall and snowfall show a slight dip compared to the preceding month. Weather in February »

Weather in March

The advent of March brings with it a discernible transition to warmer temperatures in Charlestown. Compared to February, the city experiences an increase in average high and low temperatures, while precipitation levels continue to remain somewhat stable. Weather in March »

Weather in April

The month of April sees a substantial rise in temperature in Charlestown, Rhode Island, a distinguishable characteristic of the onset of spring. With the increase in temperature, the levels of snowfall drop considerably. The transition to a warmer season is further marked by extended sunshine hours, giving April a bright and inviting ambience. Weather in April »

Weather in May

When May arrives in Charlestown, it brings an abundance of clear, sunny days. The temperatures increase even further, and residents begin to feel the full effects of spring. It's no surprise that the city is at its most vibrant during this month, with longer hours of sunshine and daylight promoting an energetic atmosphere. Weather in May »

Weather in June

The weather in June in Charlestown, Rhode Island, is warmer in comparison to the preceding months. The increase in warmth is a clear indicator of summer's arrival, and it's reflected in the heightened outdoor activities among the residents. Weather in June »

Weather in July

July in Charlestown brings the height of summer with it, marked by long, sunny days and warm nights. Compared to June, temperatures take a noticeable rise, placing July as one of the warmest months. Occasional rain keeps the weather from becoming oppressively hot, and the increased humidity adds a moist facet to the atmosphere. Weather in July »

Weather in August

In August, the temperatures in Charlestown show a marginal dip from the previous month, indicating a subtle change in season. The persistence of some humidity, relative to July, makes the weather still feel decidedly summery. The decrease in temperature is complemented by slightly shorter daylight hours, although the days remain considerably long. Weather in August »

Weather in September

September in Charlestown, Rhode Island sees another decrease in temperature, indicating the gradual shift from summer to autumn. The city experiences cooler evenings and less humidity, making it pleasant for residents. The amount of daylight reduces gradually during this month, a change that's marked by earlier sunsets and later sunrises. Weather in September »

Weather in October

October brings with it a more definitively noticeable drop in temperature in Charlestown. The changing seasons are visible in the cool, crisp days and chilly nights that become a prevailing feature of this month. The city is bathed in the beautiful colours of autumn, making it picture-perfect. Weather in October »

Weather in November

November in Charlestown signifies the beginning of the cold months, with the temperatures dropping steadily. The chilly weather is complemented by shorter daylight hours, creating a more subdued ambience in the city. Adding to this, the month also experiences an upswing in the amount of relative humidity. Weather in November »

Weather in December

By December, winter has resolutely set in over Charlestown, Rhode Island. The cold temperature is consistent, accompanied by an increased chance of snowfall towards the end of the month. Decreased daylight hours add a wintry chill to the city while the festive season keeps spirits high. Weather in December »