Climate and monthly weather forecast
Swansea, MA

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Weather in January

January, the same as December, is a wintry winter month in Swansea, Massachusetts, with an average temperature fluctuating between 25.2°F (-3.8°C) and 36°F (2.2°C). Swansea's January weather reaches an average high of 36°F (2.2°C) and an average low of 25.2°F (-3.8°C), making it the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Swansea, is also an icy month, with an average temperature varying between 26.1°F (-3.3°C) and 37.9°F (3.3°C). Swansea's weather in February, with an average high-temperature of a still cold 37.9°F (3.3°C), subtly shifts from January's 36°F (2.2°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Swansea, Massachusetts, with temperature in the range of an average low of 32.5°F (0.3°C) and an average high of 43.7°F (6.5°C). With the transition into March, Swansea experiences a subtle uplift in average high-temperatures, adjusting from an icy 37.9°F (3.3°C) in February to a chilly 43.7°F (6.5°C). Weather in March »

Weather in April

April is a fresh spring month in Swansea, Massachusetts, with an average temperature fluctuating between 41.5°F (5.3°C) and 54.1°F (12.3°C). With the onset of April, Swansea's average high-temperature experiences a rise, moving from March's chilly 43.7°F (6.5°C) to a fresh 54.1°F (12.3°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Swansea, Massachusetts, with an average temperature ranging between min 50.7°F (10.4°C) and max 64°F (17.8°C). As May arrives, Swansea's weather shows an increase in high-temperatures, moving from April's fresh 54.1°F (12.3°C) to a comfortable 64°F (17.8°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Swansea, Massachusetts, with an average temperature fluctuating between 58.1°F (14.5°C) and 72°F (22.2°C). June's arrival brings a slight change in high-temperatures, adjusting from an enjoyable 64°F (17.8°C) in May to a pleasant 72°F (22.2°C). Weather in June »

Weather in July

July in Swansea, Massachusetts, is a warm summer month, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 79.3°F (26.3°C). Swansea's warmest month, July, generally records average temperatures ranging from a high of 79.3°F (26.3°C) to a low of 65.5°F (18.6°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Swansea, Massachusetts, with temperature in the range of an average high of 78.6°F (25.9°C) and an average low of 64.9°F (18.3°C). August registers an average high-temperature of a still warm 78.6°F (25.9°C), slightly varied from July's 79.3°F (26.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Swansea, Massachusetts, with an average temperature ranging between max 72.1°F (22.3°C) and min 58.8°F (14.9°C). September heralds a minor drop in average high-temperature, sliding from August's moderately hot 78.6°F (25.9°C) to an agreeable 72.1°F (22.3°C). Weather in September »

Weather in October

October, the same as September, is another enjoyable autumn month in Swansea, Massachusetts, with an average temperature varying between 61.7°F (16.5°C) and 49.8°F (9.9°C). In Swansea, the beginning of October is marked by a lowered average high-temperature, shifting from September's pleasant 72.1°F (22.3°C) to an enjoyable 61.7°F (16.5°C). Weather in October »

Weather in November

November, the last month of the autumn in Swansea, is another cool month, with an average temperature varying between 50.9°F (10.5°C) and 40.1°F (4.5°C). The shift from October to November involves a decrease in the average high-temperature, dropping from a refreshing 61.7°F (16.5°C) to a cool 50.9°F (10.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also a wintry month in Swansea, Massachusetts, with temperature in the range of an average low of 31.8°F (-0.1°C) and an average high of 42.1°F (5.6°C). Swansea in December experiences a gentle temperature dip, with average high-temperatures reducing from a fresh 50.9°F (10.5°C) in November to a cold 42.1°F (5.6°C). Weather in December »
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

The lowest temperatures are recorded in January, with averages reaching a high of 36°F (2.2°C) and a low of 25.2°F (-3.8°C).

How many days does it rain?

In Swansea, during the entire year, the rain falls for 135.4 days and collects up to 18.31" (465mm) of precipitation.

When does it snow?

Months with snowfall are January through May, November and December.

How much does it snow?

In Swansea, Massachusetts, during the entire year, snow falls for 21.2 days and aggregates up to 7.17" (182mm) of snow.

When is the lowest UV index?

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

What are the months with the least sunshine?

February and December, with an average of 4.9h of sunshine, are months with the least sunshine.

What is the snowiest month?

March is the month with the most snowfall. Snow falls for 5.2 days and accumulates 2.13" (54mm) of snow.

When is Daylight Saving Time (DST)?

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?

With an average relative humidity of 73%, April is the least humid month.

What is the most humid month?

The most humid month is June, with an average relative humidity of 80%.

When it does not snow?

In Swansea, snow does not fall in June through October.

When are the longest days?

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

What is the month with the highest UV index?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What month is the hottest in Swansea?

July, with an average high of 79.3°F (26.3°C) and a low of 65.5°F (18.6°C), signifies the warmest month of the year in Swansea.

What month has the most sunshine?

The month with the most sunshine is August, with an average of 10.6h of sunshine.

What is the driest month?

The month with the least rainfall in Swansea is September, when the rain falls for 11.2 days and typically collects 1.06" (27mm) of precipitation.

What is the rainiest month?

October is the month with the most rainfall. Rain falls for 11.5 days and accumulates 1.97" (50mm) of precipitation.

What is the month with the shortest days?

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

Average temperature
Swansea, MA

Average temperature - Swansea, MA

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (36°F).

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure
Swansea, MA

Average pressure - Swansea, MA

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
Swansea, MA

Average wind speed - Swansea, MA

The windiest months (with the highest average wind speed) are January, February and March (10.9mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

Average rainfall
Swansea, MA

Average rainfall - Swansea, MA

The wettest month (with the highest rainfall) is October (1.97").
The driest month (with the least rainfall) is September (1.06").

Average rainfall days
Swansea, MA

Average rainfall days - Swansea, MA

The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is February (6.9 days).

Average snowfall
Swansea, MA

Average snowfall - Swansea, MA

The month with the highest snowfall is March (2.13").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days
Swansea, MA

Average snowfall days - Swansea, MA

The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight / Average sunshine
Swansea, MA

Average daylight / Average sunshine - Swansea, 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 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

Average sunshine days
Swansea, MA

Average sunshine days - Swansea, MA

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is April (13.6 days).

Average UV index
Swansea, MA

Average UV index - Swansea, MA

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 visibility
Swansea, MA

Average visibility - Swansea, MA

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).

Swansea, Massachusetts, USA

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