Climate and monthly weather forecast
Williamstown, MA

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Weather in January

January, the same as December, in Williamstown, Massachusetts, is another subzero cold winter month, with an average temperature fluctuating between 14.7°F (-9.6°C) and 27°F (-2.8°C). Williamstown's January weather reaches an average high of 27°F (-2.8°C) and an average low of 14.7°F (-9.6°C), making it the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Williamstown, is also a subzero cold month, with temperature in the range of an average low of 16.2°F (-8.8°C) and an average high of 29.8°F (-1.2°C). Williamstown greets February with an average high-temperature of a still freezing cold 29.8°F (-1.2°C), marking a slight deviation from the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Williamstown, Massachusetts, with temperature in the range of an average high of 38.8°F (3.8°C) and an average low of 23.5°F (-4.7°C). The arrival of March brings an increase in high-temperatures, moving from a freezing cold 29.8°F (-1.2°C) in February to a cold 38.8°F (3.8°C). Weather in March »

Weather in April

April is a fresh spring month in Williamstown, Massachusetts, with an average temperature fluctuating between 51.6°F (10.9°C) and 34.3°F (1.3°C). Williamstown's transition into April brings a rise in the average high-temperature, moving from an icy 38.8°F (3.8°C) in March to a fresh 51.6°F (10.9°C). Weather in April »

Weather in May

May, the last month of the spring in Williamstown, is a refreshing month, with temperature in the range of an average high of 65.1°F (18.4°C) and an average low of 45.1°F (7.3°C). Williamstown sees an increase in average high-temperatures during May, moving from a fresh 51.6°F (10.9°C) in April to an enjoyable 65.1°F (18.4°C). Weather in May »

Weather in June

June, the first month of the summer in Williamstown, is an agreeable month, with an average temperature varying between 51.4°F (10.8°C) and 72.3°F (22.4°C). The transition from May to June brings a subtle temperature rise, with average high-temperatures increasing from an enjoyable 65.1°F (18.4°C) to a pleasant 72.3°F (22.4°C). Weather in June »

Weather in July

July in Williamstown, Massachusetts, is a moderately hot summer month, with temperature in the range of an average high of 78.6°F (25.9°C) and an average low of 57°F (13.9°C). The temperatures reach their highest averages in July, with highs of 78.6°F (25.9°C) and lows of 57°F (13.9°C). Weather in July »

Weather in August

August, the last month of the summer in Williamstown, is also a moderately hot month, with an average temperature varying between 76.5°F (24.7°C) and 55.8°F (13.2°C). August notes an average high-temperature of a still warm 76.5°F (24.7°C), subtly differing from July's 78.6°F (25.9°C). Weather in August »

Weather in September

September, the first month of the autumn in Williamstown, is still a pleasant month, with temperature in the range of an average low of 49.3°F (9.6°C) and an average high of 69.1°F (20.6°C). With the onset of September, the average high-temperature subtly recedes from August's warm 76.5°F (24.7°C) to an agreeable 69.1°F (20.6°C). Weather in September »

Weather in October

October, the same as September, in Williamstown, Massachusetts, is another mild autumn month, with an average temperature varying between 41°F (5°C) and 55.9°F (13.3°C). The decrease of average high-temperatures is mild in October, with a decline from an agreeable 69.1°F (20.6°C) in September to a refreshing 55.9°F (13.3°C). Weather in October »

Weather in November

November, the last month of the autumn in Williamstown, is also a frosty month, with an average temperature ranging between min 30°F (-1.1°C) and max 43.7°F (6.5°C). In November, the meteorological conditions alter, with the average high-temperature shifting from a moderate 55.9°F (13.3°C) in October to a frosty 43.7°F (6.5°C). Weather in November »

Weather in December

The first month of the winter, December, is also an icy month in Williamstown, Massachusetts, with an average temperature varying between 22.1°F (-5.5°C) and 32.7°F (0.4°C). December's arrival coincides with a drop in the average high-temperature, decreasing from November's frosty 43.7°F (6.5°C) to a cold 32.7°F (0.4°C). Weather in December »
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Frequently asked questions

What is the coldest month in Williamstown?

Williamstown's temperature records reveal January as the coldest month, marked by average highs of 27°F (-2.8°C) and lows of 14.7°F (-9.6°C).

How much does it rain in Williamstown?

In Williamstown, Massachusetts, during the entire year, the rain falls for 167.1 days and collects up to 35.98" (914mm) of precipitation.

When does it snow in Williamstown?

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

How much does it snow in Williamstown?

In Williamstown, Massachusetts, during the entire year, snow falls for 66.1 days and aggregates up to 39.09" (993mm) of snow.

What is the most humid month in Williamstown?

With an average relative humidity of 86%, February is the most humid month in Williamstown.

What is the snowiest month in Williamstown?

February is the month with the most snowfall in Williamstown. Snow falls for 15.8 days and accumulates 10" (254mm) of snow.

What is the month with the least sunshine in Williamstown?

With an average of 3.4h of sunshine, February has the least sunshine of the year in Williamstown.

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

February and December, with an average maximum UV index of 1, are months with the lowest UV index in Williamstown, Massachusetts.

What is the driest month in Williamstown?

The month with the least rainfall is March, when the rain falls for 14.1 days and typically collects 2.6" (66mm) of precipitation.

When is Daylight Saving Time (DST) in Williamstown?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Williamstown, Massachusetts, 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 Williamstown?

April is the least humid month, with an average relative humidity of 77%.

When it does not snow in Williamstown?

June through September are months without snowfall.

When are the longest days in Williamstown?

With an average of 15h and 18min of daylight, June has the longest days of the year.

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

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

What month is the hottest in Williamstown?

July, with an average high of 78.6°F (25.9°C) and a low of 57°F (13.9°C), signifies the warmest month of the year in Williamstown, Massachusetts.

What month has the most sunshine in Williamstown?

July has the most sunshine of the year, with an average of 9.9h of sunshine.

What is the wettest month in Williamstown?

October is the month with the most rainfall in Williamstown, Massachusetts. Rain falls for 15.5 days and accumulates 3.62" (92mm) of precipitation.

What is the month with the shortest days in Williamstown?

With an average of 9h and 6min of daylight, December has the shortest days of the year in Williamstown, Massachusetts.

Average temperature
Williamstown, MA

Average temperature - Williamstown, MA

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (27°F).

The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is January (14.7°F).

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Average pressure
Williamstown, MA

Average pressure - Williamstown, MA

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed
Williamstown, MA

Average wind speed - Williamstown, MA

The windiest months (with the highest average wind speed) are January and February (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity
Williamstown, MA

Average humidity - Williamstown, MA

The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is April (77%).

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Average rainfall
Williamstown, MA

Average rainfall - Williamstown, MA

The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is March (2.6").

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Average rainfall days
Williamstown, MA

Average rainfall days - Williamstown, MA

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (7.8 days).

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Average snowfall
Williamstown, MA

Average snowfall - Williamstown, MA

The month with the highest snowfall is February (10").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Williamstown, MA

Average snowfall days - Williamstown, MA

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
Williamstown, MA

Average daylight / Average sunshine - Williamstown, MA

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).

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Average sunshine days
Williamstown, MA

Average sunshine days - Williamstown, MA

The month with the most sunshine days is September (14.3 days).
The month with the least sunshine days is February (9 days).

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Average UV index
Williamstown, MA

Average UV index - Williamstown, MA

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).

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Average visibility
Williamstown, MA

Average visibility - Williamstown, MA

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

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Williamstown, Massachusetts, USA

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