Climate and monthly weather forecast
Charlton, MA

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Weather in January

January, like December, is another subzero cold winter month in Charlton, Massachusetts, with an average temperature fluctuating between 31.5°F (-0.3°C) and 19.6°F (-6.9°C). The coldest time of the year is January, with temperatures averaging a high of 31.5°F (-0.3°C) and a low of 19.6°F (-6.9°C). Weather in January »

Weather in February

The last month of the winter, February, is a wintry month in Charlton, Massachusetts, with temperature in the range of an average low of 20.7°F (-6.3°C) and an average high of 35.1°F (1.7°C). February registers an average high-temperature of an icy 35.1°F (1.7°C), slightly varied from January's 31.5°F (-0.3°C). Weather in February »

Weather in March

The first month of the spring, March, is still a cold month in Charlton, Massachusetts, with an average temperature fluctuating between 28.2°F (-2.1°C) and 42.4°F (5.8°C). March showcases a minor temperature ascent, adjusting from February's cold 35.1°F (1.7°C) to a still icy 42.4°F (5.8°C). Weather in March »

Weather in April

April is a refreshing spring month in Charlton, Massachusetts, with an average temperature varying between 38.1°F (3.4°C) and 55.6°F (13.1°C). The start of April signals an increase in the average high-temperature, moving from a wintry 42.4°F (5.8°C) in March to a refreshing 55.6°F (13.1°C). Weather in April »

Weather in May

The last month of the spring, May, is an enjoyable month in Charlton, Massachusetts, with an average temperature varying between 67.1°F (19.5°C) and 48°F (8.9°C). May witnesses an increase in the average high-temperature, moving from a moderate 55.6°F (13.1°C) in April to a comfortable 67.1°F (19.5°C). Weather in May »

Weather in June

June, the first month of the summer in Charlton, is a warm month, with an average temperature ranging between max 74.3°F (23.5°C) and min 55°F (12.8°C). The shift from May to June introduces a subtle increase in the average high-temperature, moving from a comfortable 67.1°F (19.5°C) to a moderately hot 74.3°F (23.5°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Charlton, Massachusetts, with an average temperature fluctuating between 61.7°F (16.5°C) and 81.3°F (27.4°C). July brings the highest temperatures, with an average high of 81.3°F (27.4°C) and an average low of 61.7°F (16.5°C). The heat index value during July is computed to be a hot 86°F (30°C). Weather in July »

Weather in August

August, the last month of the summer in Charlton, is another warm month, with an average temperature ranging between min 60.4°F (15.8°C) and max 79.5°F (26.4°C). The arrival of August is marked by an average high-temperature of a still moderately hot 79.5°F (26.4°C), bearing a close resemblance to July. Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Charlton, Massachusetts, with temperature in the range of an average high of 72°F (22.2°C) and an average low of 53.8°F (12.1°C). September implies a soft temperature shift, with average high-temperatures reducing from August's warm 79.5°F (26.4°C) to a pleasant 72°F (22.2°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Charlton, Massachusetts, with an average temperature fluctuating between 45.1°F (7.3°C) and 59.9°F (15.5°C). The average high-temperature decreases in October, shifting from a pleasant 72°F (22.2°C) in September to a mild 59.9°F (15.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Charlton, is another chilly month, with temperature in the range of an average high of 47.3°F (8.5°C) and an average low of 34.5°F (1.4°C). With the beginning of November, the average high-temperature shows a decrease, transitioning from a mild 59.9°F (15.5°C) in October to a frosty 47.3°F (8.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Charlton, Massachusetts, with temperature in the range of an average high of 37.2°F (2.9°C) and an average low of 27°F (-2.8°C). The move into December indicates a reduction in the average high-temperature, down from November's chilly 47.3°F (8.5°C) to a wintry 37.2°F (2.9°C). Weather in December »
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Frequently asked questions

What time of the year is the coldest in Charlton?

In Charlton, the lowest temperatures are generally noted in January, averaging a high of 31.5°F (-0.3°C) and a low of 19.6°F (-6.9°C).

How many days does it rain in Charlton?

In Charlton, Massachusetts, during the entire year, the rain falls for 151.1 days and collects up to 31.26" (794mm) of precipitation.

When does it snow in Charlton?

January through May, October through December are months with snowfall in Charlton, Massachusetts.

How much does it snow in Charlton?

In Charlton, during the entire year, snow falls for 37.7 days and aggregates up to 20.59" (523mm) of snow.

What is the month with the lowest UV index in Charlton?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the most humid month in Charlton?

February is the most humid month in Charlton, with an average relative humidity of 81%.

What is the snowiest month in Charlton?

The months with the most snowfall in Charlton are February and March, with an average 5.08" (129mm) of accumulated snow.

What is the month with the least sunshine in Charlton?

February has the least sunshine of the year, with an average of 4.5h of sunshine.

When is Daylight Saving Time (DST) in Charlton?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 least humid month in Charlton?

The least humid month in Charlton is April, with an average relative humidity of 72%.

When it does not snow in Charlton?

June through September are months without snowfall in Charlton.

When are the longest days in Charlton?

June has the longest days of the year, with an average of 15h and 12min of daylight.

What are the months with the highest UV index in Charlton?

The months with the highest UV index in Charlton are June and July, with an average maximum UV index of 6.

What are the warmest months in Charlton?

The warmest period in Charlton tends to be July, when average temperatures fluctuate between a high of 81.3°F (27.4°C) and a low of 61.7°F (16.5°C).

What month has the most sunshine in Charlton?

August has the most sunshine of the year, with an average of 10h of sunshine.

What is the driest month in Charlton?

September is the month with the least rainfall. Rain falls for 12.4 days and accumulates 1.81" (46mm) of precipitation.

What is the rainiest month in Charlton?

December is the month with the most rainfall in Charlton, Massachusetts. Rain falls for 10.9 days and accumulates 3.11" (79mm) of precipitation.

What is the month with the shortest days in Charlton?

With an average of 9h and 12min of daylight, December has the shortest days of the year in Charlton, Massachusetts.

Average temperature
Charlton, MA

Average temperature - Charlton, MA

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.5°F).

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).

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Average pressure
Charlton, MA

Average pressure - Charlton, MA

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed
Charlton, MA

Average wind speed - Charlton, MA

The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average rainfall
Charlton, MA

Average rainfall - Charlton, MA

The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days
Charlton, MA

Average rainfall days - Charlton, MA

The month with the highest number of rainy days is July (16.3 days).
The months with the least rainy days are January and February (7.8 days).

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Average snowfall
Charlton, MA

Average snowfall - Charlton, MA

The months with the highest snowfall are February and March (5.08").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Charlton, MA

Average snowfall days - Charlton, MA

The month with the highest number of snowfall days is March (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Charlton, MA

Average daylight / Average sunshine - Charlton, MA

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days
Charlton, MA

Average sunshine days - Charlton, MA

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (12.9 days).

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Average UV index
Charlton, MA

Average UV index - Charlton, MA

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average visibility
Charlton, MA

Average visibility - Charlton, MA

The months with the highest visibility are March, April, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and October (5mi).

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Charlton, Massachusetts, USA

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