Climate and monthly weather forecast
Charleston, ME

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Weather in January

January, like December, is a freezing cold winter month in Charleston, Maine, with an average temperature fluctuating between 10.8°F (-11.8°C) and 23.9°F (-4.5°C). Charleston's January weather, marked by an average high temperature of 23.9°F (-4.5°C) and an average low temperature of 10.8°F (-11.8°C), is the coldest in the year. Weather in January »

Weather in February

February, the last month of the winter in Charleston, is also a subzero cold month, with an average temperature fluctuating between 26.1°F (-3.3°C) and 12.2°F (-11°C). February's arrival registers an average high-temperature of a still subzero cold 26.1°F (-3.3°C), closely aligning with the temperature of the previous month. Weather in February »

Weather in March

March, the first month of the spring in Charleston, is an icy month, with an average temperature fluctuating between 34°F (1.1°C) and 19.8°F (-6.8°C). March comes with a subtle rise, with the average high-temperature adjusting from a subzero cold 26.1°F (-3.3°C) in February to a wintry 34°F (1.1°C). Weather in March »

Weather in April

April in Charleston, Maine, is a frosty spring month, with temperature in the range of an average low of 31.5°F (-0.3°C) and an average high of 48°F (8.9°C). Noticing a change, the average high-temperature during April moves from March's icy 34°F (1.1°C) to a chilly 48°F (8.9°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Charleston, Maine, with an average temperature ranging between max 62.2°F (16.8°C) and min 42.3°F (5.7°C). A shift in the average high-temperature is noticeable in May, changing from a frosty 48°F (8.9°C) in April to a comfortable 62.2°F (16.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a pleasant month in Charleston, Maine, with temperature in the range of an average low of 49.6°F (9.8°C) and an average high of 69.8°F (21°C). The shift from May to June sees a slight increase in the average high-temperature, transitioning from a refreshing 62.2°F (16.8°C) to a pleasant 69.8°F (21°C). Weather in June »

Weather in July

July in Charleston, Maine, is a moderately hot summer month, with an average temperature varying between 55.9°F (13.3°C) and 77.2°F (25.1°C). July stands out as Charleston's warmest month, with temperatures ranging between an average high of 77.2°F (25.1°C) and a low of 55.9°F (13.3°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Charleston, Maine, with an average temperature ranging between min 54.7°F (12.6°C) and max 75.9°F (24.4°C). Entering August, Charleston's average high-temperature reads a still moderately hot 75.9°F (24.4°C), indicating a close resemblance to the previous month's climate. Weather in August »

Weather in September

September, the first month of the autumn in Charleston, is still a pleasant month, with an average temperature varying between 48.6°F (9.2°C) and 68°F (20°C). A minor decrease in the average high-temperature is observed during September, shifting from a warm 75.9°F (24.4°C) in August to an agreeable 68°F (20°C). Weather in September »

Weather in October

October, the same as September, is another fresh autumn month in Charleston, Maine, with temperature in the range of an average high of 54°F (12.2°C) and an average low of 39.9°F (4.4°C). The transition into October involves a decrease in the average high-temperature, falling from a pleasant 68°F (20°C) in September to a cool 54°F (12.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a wintry month in Charleston, Maine, with temperature in the range of an average low of 28.9°F (-1.7°C) and an average high of 41°F (5°C). The arrival of November signals a shift in temperature, down from a fresh 54°F (12.2°C) in October to a wintry 41°F (5°C). Weather in November »

Weather in December

December, the first month of the winter in Charleston, is still a freezing cold month, with temperature in the range of an average low of 18.7°F (-7.4°C) and an average high of 29.1°F (-1.6°C). December suggests a modest reduction in the average high-temperature, shifting from a wintry 41°F (5°C) in November to a freezing cold 29.1°F (-1.6°C). Weather in December »
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Frequently asked questions

What is the coldest time of year in Charleston?

Charleston's coldest temperatures are experienced in January, with average high temperatures of 23.9°F (-4.5°C) and lows of 10.8°F (-11.8°C).

How many days does it rain in Charleston?

Throughout the year, there are 154.3 rainfall days, and 32.68" (830mm) of precipitation is accumulated.

When does it snow in Charleston?

January through May, October through December are months with snowfall.

How many days does it snow in Charleston?

Throughout the year, in Charleston, Maine, there are 69.5 snowfall days, and 49.96" (1269mm) of snow is accumulated.

What are the months with the lowest UV index in Charleston?

The months with the lowest UV index in Charleston are January through March, October through December, with an average maximum UV index of 2.

What is the most humid month in Charleston?

With an average relative humidity of 88%, February is the most humid month.

When does it snow the most in Charleston?

The month with the most snowfall in Charleston, Maine, is February, when snow falls for 15.8 days and typically aggregates up to 11.26" (286mm) of snow.

What is the month with the least sunshine in Charleston?

February has the least sunshine of the year in Charleston, with an average of 3.8h of sunshine.

When is Daylight Saving Time (DST) in Charleston?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Charleston, Maine, 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.

What is the rainiest month in Charleston?

The month with the most rainfall in Charleston is April, when the rain falls for 15.4 days and typically aggregates up to 3.54" (90mm) of precipitation.

What is the least humid month in Charleston?

With an average relative humidity of 76%, May is the least humid month.

When it does not snow in Charleston?

In Charleston, snow does not fall in June through September.

When are the longest days in Charleston?

June has the longest days of the year in Charleston, with an average of 15h and 36min of daylight.

What is the month with the highest UV index in Charleston?

The months with the highest UV index are June through August, with an average maximum UV index of 5.

What part of the year is the hottest in Charleston?

The month of July, characterized by an average high of 77.2°F (25.1°C) and a low of 55.9°F (13.3°C), is recognized as the warmest.

What is the driest month in Charleston?

The month with the least rainfall is July, when the rain falls for 16.7 days and typically collects 1.89" (48mm) of precipitation.

What month has the most sunshine in Charleston?

August has the most sunshine of the year in Charleston, with an average of 9.9h of sunshine.

What is the month with the shortest days in Charleston?

With an average of 8h and 48min of daylight, December has the shortest days of the year in Charleston.

Average temperature
Charleston, ME

Average temperature - Charleston, ME

The warmest month (with the highest average high temperature) is July (77.2°F).
The month with the lowest average high temperature is January (23.9°F).

The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

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Average pressure
Charleston, ME

Average pressure - Charleston, ME

The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed
Charleston, ME

Average wind speed - Charleston, ME

The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average rainfall
Charleston, ME

Average rainfall - Charleston, ME

The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is July (1.89").

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Average rainfall days
Charleston, ME

Average rainfall days - Charleston, ME

The months with the highest number of rainy days are May and July (16.7 days).
The month with the least rainy days is February (6.8 days).

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Average snowfall
Charleston, ME

Average snowfall - Charleston, ME

The month with the highest snowfall is February (11.26").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Charleston, ME

Average snowfall days - Charleston, ME

The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Charleston, ME

Average daylight / Average sunshine - Charleston, ME

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

The month with the most sunshine is August (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

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Average sunshine days
Charleston, ME

Average sunshine days - Charleston, ME

The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is April (10.7 days).

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Average UV index
Charleston, ME

Average UV index - Charleston, ME

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average visibility
Charleston, ME

Average visibility - Charleston, ME

The months with the highest visibility are April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February and March (4mi).

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Charleston, Maine, USA

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