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Contents
- 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
Weather in January
January, the same as December, in Charleston, Maine, is another subzero cold winter month, with an average temperature fluctuating between 23.9°F (-4.5°C) and 10.8°F (-11.8°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 23.9°F (-4.5°C) and a low of 10.8°F (-11.8°C). Weather in January »
Weather in February
The last month of the winter, February, is another freezing cold month in Charleston, Maine, with temperature in the range of an average low of 12.2°F (-11°C) and an average high of 26.1°F (-3.3°C). The arrival of February records an average high-temperature of a still subzero cold 26.1°F (-3.3°C), closely related to the 23.9°F (-4.5°C) observed in January. Weather in February »
Weather in March
The first month of the spring, March, is a wintry month in Charleston, Maine, with temperature in the range of an average low of 19.8°F (-6.8°C) and an average high of 34°F (1.1°C). The start of March signals a slight increase in the average high-temperature, moving from a freezing cold 26.1°F (-3.3°C) in February to an icy 34°F (1.1°C). Weather in March »
Weather in April
April in Charleston, Maine, is a chilly spring month, with an average temperature ranging between min 31.5°F (-0.3°C) and max 48°F (8.9°C). The start of April brings a rise in the average high-temperature, moving from an icy 34°F (1.1°C) in March 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 temperature in the range of an average low of 42.3°F (5.7°C) and an average high of 62.2°F (16.8°C). With the transition into May, Charleston experiences an increase in average high-temperatures, moving up from a chilly 48°F (8.9°C) in April to a refreshing 62.2°F (16.8°C). Weather in May »
Weather in June
The first month of the summer, June, is an agreeable 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 an agreeable 69.8°F (21°C). Weather in June »
Weather in July
July in Charleston, Maine, is a moderately hot summer month, with temperature in the range of an average low of 55.9°F (13.3°C) and an average high of 77.2°F (25.1°C). Charleston experiences its highest temperatures in July, with an average peak of 77.2°F (25.1°C) and a low of 55.9°F (13.3°C). Weather in July »
Weather in August
August, the last month of the summer in Charleston, is another warm month, with an average temperature varying between 54.7°F (12.6°C) and 75.9°F (24.4°C). The onset of August marks an average high-temperature of a still warm 75.9°F (24.4°C), hardly differing from July's 77.2°F (25.1°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Charleston, Maine, with an average temperature ranging between max 68°F (20°C) and min 48.6°F (9.2°C). Charleston's weather subtly changes with the onset of September, barely falling from a moderately hot 75.9°F (24.4°C) in August to a pleasant 68°F (20°C). Weather in September »
Weather in October
October, like September, in Charleston, Maine, is another fresh autumn month, with an average temperature ranging between max 54°F (12.2°C) and min 39.9°F (4.4°C). The arrival of October corresponds with a shift in temperature, down from a pleasant 68°F (20°C) in September to a fresh 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 commencement of November indicates a shift in the average high-temperature, receding from October's cool 54°F (12.2°C) to a wintry 41°F (5°C). Weather in November »
Weather in December
The first month of the winter, December, is also a subzero cold month in Charleston, Maine, with an average temperature ranging between min 18.7°F (-7.4°C) and max 29.1°F (-1.6°C). The onset of December comes with a shift in the average high-temperature, falling from a cold 41°F (5°C) in November to a freezing cold 29.1°F (-1.6°C). Weather in December »
Updated: Jun 4, 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 month?
The coldest temperatures occur during January, when averages reach a peak of 23.9°F (-4.5°C) and a low of 10.8°F (-11.8°C).
How many days does it rain in Charleston?
In Charleston, during the entire year, the rain falls for 154.3 days and collects up to 32.68" (830mm) of precipitation.
When does it snow?
Months with snowfall are January through May, October through December.
How much does it snow?
Throughout the year, there are 69.5 snowfall days, and 49.96" (1269mm) of snow is accumulated.
When is the lowest UV index?
The months with the lowest UV index are January through March, October through December, with an average maximum UV index of 2.
What is the most humid month?
February is the most humid month, with an average relative humidity of 88%.
When does it snow the most?
The month with the most snowfall 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?
The month with the least sunshine is February, with an average of 3.8h of sunshine.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Charleston, 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?
April is the month with the most rainfall. Rain falls for 15.4 days and accumulates 3.54" (90mm) of precipitation.
What is the least humid month?
May is the least humid month, with an average relative humidity of 76%.
When it does not snow?
June through September are months without snowfall.
When are the longest days?
With an average of 15h and 36min of daylight, June has the longest days of the year.
What are the months with the highest UV index?
June through August, with an average maximum UV index of 5, are months with the highest UV index in Charleston.
What time of the year is the hottest?
July is the month when Charleston sees the average highest temperatures, with a high of 77.2°F (25.1°C) and a low of 55.9°F (13.3°C).
What is the driest month?
July is the month with the least rainfall. Rain falls for 16.7 days and accumulates 1.89" (48mm) of precipitation.
What month has the most sunshine?
August has the most sunshine of the year, with an average of 9.9h of sunshine.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 8h and 48min of daylight.
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).
Average pressure
Charleston, ME
- Average pressure in January:
29.96"Hg - Average pressure in February:
29.96"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.01"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Charleston, ME
- Average wind speed in January:
7.1mph - Average wind speed in February:
7.3mph - Average wind speed in March:
7.5mph - Average wind speed in April:
7.3mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.7mph - Average wind speed in December:
6.8mph
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).
Average humidity
Charleston, ME
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is May (76%).
Average rainfall
Charleston, ME
- Average rainfall in January:
2.56" - Average rainfall in February:
2.24" - Average rainfall in March:
2.2" - Average rainfall in April:
3.54" - Average rainfall in May:
2.72" - Average rainfall in June:
2.99"
- Average rainfall in July:
1.89" - Average rainfall in August:
2.6" - Average rainfall in September:
2.44" - Average rainfall in October:
3.39" - Average rainfall in November:
2.87" - Average rainfall in December:
3.23"
The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is July (1.89").
Average rainfall days
Charleston, ME
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
10.9 days - Average rainfall days in April:
15.4 days - Average rainfall days in May:
16.7 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
16.7 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
13.7 days - Average rainfall days in November:
10.7 days - Average rainfall days in December:
10.8 days
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).
Average snowfall
Charleston, ME
- Average snowfall in January:
10.04" - Average snowfall in February:
11.26" - Average snowfall in March:
7.6" - Average snowfall in April:
6.14" - Average snowfall in May:
0.28" - Average snowfall in June:
0"
The month with the highest snowfall is February (11.26").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Charleston, ME
- Average snowfall days in January:
14.4 days - Average snowfall days in February:
15.8 days - Average snowfall days in March:
13.6 days - Average snowfall days in April:
5.9 days - Average snowfall days in May:
0.2 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:
1.1 days - Average snowfall days in November:
6.1 days - Average snowfall days in December:
12.4 days
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).
Average daylight / Average sunshine
Charleston, ME
- Average daylight in January:
9h and 1min - Average daylight in February:
10h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 4min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
10h and 5min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
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).
- Average sunshine in January:
4h and 2min - Average sunshine in February:
3h and 5min - Average sunshine in March:
4h and 5min - Average sunshine in April:
6h and 5min - Average sunshine in May:
7h and 5min - Average sunshine in June:
8h and 2min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 5min - Average sunshine in September:
8h and 1min - Average sunshine in October:
5h and 5min - Average sunshine in November:
4h and 5min - Average sunshine in December:
4h and 1min
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).
Average sunshine days
Charleston, ME
- Average sunshine days in January:
14.2 days - Average sunshine days in February:
11 days - Average sunshine days in March:
12.2 days - Average sunshine days in April:
10.7 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
11.5 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
13.1 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
14.7 days - Average sunshine days in November:
15.4 days - Average sunshine days in December:
13.9 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is April (10.7 days).
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).
Average cloud cover
Charleston, ME
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 40).
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).
Charleston, Maine, USA
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