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Contents
- The climate of Charlestown
- The best time to visit Charlestown
- The worst time to visit Charlestown
- Spring weather in Charlestown
- Summer weather in Charlestown
- Autumn weather in Charlestown
- Winter weather in Charlestown
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
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.
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 »
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Charlestown?
January, characterized by an average high temperature of 37.6°F (3.1°C) and a low temperature of 28.8°F (-1.8°C), is generally the coldest month in Charlestown.
How many days does it rain in Charlestown?
Throughout the year, there are 154.7 rainfall days, and 32.01" (813mm) of precipitation is accumulated.
When does it snow in Charlestown?
January through March, November and December are months with snowfall in Charlestown.
How many days does it snow in Charlestown?
Throughout the year, in Charlestown, Rhode Island, there are 17.8 snowfall days, and 6.85" (174mm) of snow is accumulated.
What are the months with the lowest UV index in Charlestown?
The months with the lowest UV index in Charlestown are January through March and December, with an average maximum UV index of 2.
What are the months with the least sunshine in Charlestown?
February and December, with an average of 4.9h of sunshine, are months with the least sunshine.
What are the least humid months in Charlestown?
The months with the lowest humidity are March and November, with an average relative humidity of 74%.
When does it snow the most in Charlestown?
March is the month with the most snowfall in Charlestown, Rhode Island. Snow falls for 4.8 days and accumulates 2.6" (66mm) of snow.
When is Daylight Saving Time (DST) in Charlestown?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Charlestown, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
When it does not snow in Charlestown?
In Charlestown, snow does not fall in April through October.
What is the most humid month in Charlestown?
June is the most humid month, with an average relative humidity of 82%.
When are the longest days in Charlestown?
The month with the longest days in Charlestown, Rhode Island, is June, with an average of 15h and 6min of daylight.
What is the month with the highest UV index in Charlestown?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Charlestown, Rhode Island.
What month is the hottest in Charlestown?
August temperatures in Charlestown, Rhode Island, tend to peak at an average high of 76.1°F (24.5°C) and dip to a low of 68.2°F (20.1°C).
What month has the most sunshine in Charlestown?
August has the most sunshine of the year, with an average of 10.7h of sunshine.
What is the driest month in Charlestown?
The month with the least rainfall is September, when the rain falls for 12.2 days and typically collects 1.69" (43mm) of precipitation.
What is the wettest month in Charlestown?
The month with the most rainfall in Charlestown is December, when the rain falls for 13 days and typically aggregates up to 3.66" (93mm) of precipitation.
What is the month with the shortest days in Charlestown?
The month with the shortest days in Charlestown, Rhode Island, is December, with an average of 9h and 12min of daylight.
Average temperature
Charlestown, RI
The warmest month (with the highest average high temperature) is August (76.1°F).
The month with the lowest average high temperature is January (37.6°F).
The months with the highest average low temperature are July and August (68.2°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure
Charlestown, RI
- Average pressure in January:
30.02"Hg - Average pressure in February:
30"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Charlestown, RI
- Average wind speed in January:
14.8mph - Average wind speed in February:
14.3mph - Average wind speed in March:
14mph - Average wind speed in April:
12.8mph - Average wind speed in May:
11.2mph - Average wind speed in June:
10.1mph
- Average wind speed in July:
9.5mph - Average wind speed in August:
9.6mph - Average wind speed in September:
10.7mph - Average wind speed in October:
13.2mph - Average wind speed in November:
13.9mph - Average wind speed in December:
14.3mph
The windiest month (with the highest average wind speed) is January (14.8mph).
The calmest month (with the lowest average wind speed) is July (9.5mph).
Average humidity
Charlestown, RI
The month with the highest relative humidity is June (82%).
The months with the lowest relative humidity are March and November (74%).
Average rainfall
Charlestown, RI
- Average rainfall in January:
2.6" - Average rainfall in February:
2.44" - Average rainfall in March:
3.11" - Average rainfall in April:
3.07" - Average rainfall in May:
2.4" - Average rainfall in June:
2.6"
- Average rainfall in July:
2.32" - Average rainfall in August:
2.28" - Average rainfall in September:
1.69" - Average rainfall in October:
3.27" - Average rainfall in November:
2.56" - Average rainfall in December:
3.66"
The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days
Charlestown, RI
- Average rainfall days in January:
8.8 days - Average rainfall days in February:
10.1 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
14.8 days - Average rainfall days in May:
14.5 days - Average rainfall days in June:
14.9 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
14.2 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
13 days - Average rainfall days in November:
11.1 days - Average rainfall days in December:
13 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is January (8.8 days).
Average snowfall
Charlestown, RI
The month with the highest snowfall is March (2.6").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Charlestown, RI
- Average snowfall days in January:
4.9 days - Average snowfall days in February:
4.2 days - Average snowfall days in March:
4.8 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
2.8 days
The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Charlestown, RI
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
5h and 1min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 3min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 4min - Average sunshine in September:
9h and 0min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days
Charlestown, RI
- Average sunshine days in January:
16.5 days - Average sunshine days in February:
14.2 days - Average sunshine days in March:
13.7 days - Average sunshine days in April:
13.9 days - Average sunshine days in May:
14.3 days - Average sunshine days in June:
13.5 days
- Average sunshine days in July:
12.9 days - Average sunshine days in August:
14.6 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
16.9 days - Average sunshine days in December:
15.3 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is July (12.9 days).
Average UV index
Charlestown, RI
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).
Average cloud cover
Charlestown, RI
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Charlestown, RI
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Charlestown, Rhode Island, USA
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