Climate and monthly weather forecast
South Lancaster, MA

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Weather in January

January, the same as December, in South Lancaster, Massachusetts, is a freezing cold winter month, with temperature in the range of an average high of 31.5°F (-0.3°C) and an average low of 19.8°F (-6.8°C). With average high and low temperatures of 31.5°F (-0.3°C) and 19.8°F (-6.8°C) respectively, January is South Lancaster's coldest month. Weather in January »

Weather in February

The last month of the winter, February, is an icy month in South Lancaster, Massachusetts, with temperature in the range of an average high of 34.7°F (1.5°C) and an average low of 20.1°F (-6.6°C). During February, South Lancaster observes a subtle ascent to a wintry 34.7°F (1.5°C) from January's 31.5°F (-0.3°C) in the average high-temperature. Weather in February »

Weather in March

March, the first month of the spring in South Lancaster, is still a cold month, with an average temperature ranging between max 42.4°F (5.8°C) and min 27.9°F (-2.3°C). March's onset brings a minor rise in the average high-temperature, moving from an icy 34.7°F (1.5°C) in February to a still cold 42.4°F (5.8°C). Weather in March »

Weather in April

April in South Lancaster, Massachusetts, is a moderate spring month, with temperature in the range of an average high of 55.6°F (13.1°C) and an average low of 38.1°F (3.4°C). April's onset is marked by a temperature increase, moving from a cold 42.4°F (5.8°C) in March to a mild 55.6°F (13.1°C). Weather in April »

Weather in May

The last month of the spring, May, is a refreshing month in South Lancaster, Massachusetts, with an average temperature ranging between min 47.8°F (8.8°C) and max 67.5°F (19.7°C). As May arrives, South Lancaster's weather shows an increase in high-temperatures, moving from April's moderate 55.6°F (13.1°C) to a comfortable 67.5°F (19.7°C). Weather in May »

Weather in June

June, the first month of the summer in South Lancaster, is a warm month, with an average temperature ranging between min 55.4°F (13°C) and max 75.2°F (24°C). With the transition into June, South Lancaster experiences a subtle uplift in average high-temperatures, adjusting from a comfortable 67.5°F (19.7°C) in May to a warm 75.2°F (24°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in South Lancaster, Massachusetts, with an average temperature fluctuating between 62.2°F (16.8°C) and 81.9°F (27.7°C). South Lancaster's temperatures tend to reach their peak averages in July, with a high of 81.9°F (27.7°C) and a low of 62.2°F (16.8°C). Throughout July, the heat index is estimated at a hot 87.8°F (31°C). Weather in July »

Weather in August

August, the last month of the summer in South Lancaster, is another warm month, with an average temperature varying between 60.4°F (15.8°C) and 80.1°F (26.7°C). South Lancaster experiences a recorded average high-temperature of a still moderately hot 80.1°F (26.7°C) in August, closely aligned with July's 81.9°F (27.7°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in South Lancaster, Massachusetts, with temperature in the range of an average high of 72.5°F (22.5°C) and an average low of 54°F (12.2°C). The arrival of September suggests a slight decrease in the average high-temperature, moving from a warm 80.1°F (26.7°C) in August to an agreeable 72.5°F (22.5°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in South Lancaster, Massachusetts, with temperature in the range of an average low of 45°F (7.2°C) and an average high of 59.7°F (15.4°C). The arrival of October indicates a decrease in the average high-temperature, moving from a pleasant 72.5°F (22.5°C) in September to a moderate 59.7°F (15.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in South Lancaster, Massachusetts, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 47.3°F (8.5°C). A shift in the average high-temperature occurs in November, reducing from a moderate 59.7°F (15.4°C) in October to a frosty 47.3°F (8.5°C). Weather in November »

Weather in December

December, the first month of the winter in South Lancaster, is also an icy month, with an average temperature fluctuating between 37.4°F (3°C) and 26.6°F (-3°C). As December commences, the average high-temperature shows a reduction, transitioning from a frosty 47.3°F (8.5°C) in November to a wintry 37.4°F (3°C). Weather in December »
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Frequently asked questions

What time of the year is the coldest in South Lancaster?

January proves to be the coldest month, recording an average maximum temperature of 31.5°F (-0.3°C) and a minimum temperature of 19.8°F (-6.8°C).

How many days does it rain in South Lancaster?

Throughout the year, there are 150.4 rainfall days, and 28.86" (733mm) of precipitation is accumulated.

When does it snow in South Lancaster?

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

How much does it snow in South Lancaster?

In South Lancaster, during the entire year, snow falls for 36.5 days and aggregates up to 23.82" (605mm) of snow.

What is the month with the lowest UV index in South Lancaster?

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 South Lancaster?

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

What is the snowiest month in South Lancaster?

February is the month with the most snowfall in South Lancaster. Snow falls for 9.4 days and accumulates 6.1" (155mm) of snow.

What is the month with the least sunshine in South Lancaster?

The month with the least sunshine in South Lancaster is February, with an average of 4.6h of sunshine.

When is Daylight Saving Time (DST) in South Lancaster?

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

The least humid month is April, with an average relative humidity of 71%.

When it does not snow in South Lancaster?

In South Lancaster, snow does not fall in June through September.

When are the longest days in South Lancaster?

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

What are the months with the highest UV index in South Lancaster?

The months with the highest UV index in South Lancaster, Massachusetts, are June through August, with an average maximum UV index of 6.

What is the warmest month in South Lancaster?

South Lancaster experiences its average highest temperatures in July, reaching a peak of 81.9°F (27.7°C) and a minimum of 62.2°F (16.8°C).

What month has the most sunshine in South Lancaster?

The month with the most sunshine in South Lancaster, Massachusetts, is August, with an average of 10.2h of sunshine.

What is the driest month in South Lancaster?

September is the month with the least rainfall. Rain falls for 12.3 days and accumulates 1.57" (40mm) of precipitation.

What is the rainiest month in South Lancaster?

December is the month with the most rainfall in South Lancaster. Rain falls for 10.7 days and accumulates 2.91" (74mm) of precipitation.

What is the month with the shortest days in South Lancaster?

December has the shortest days of the year in South Lancaster, Massachusetts, with an average of 9h and 6min of daylight.

Average temperature
South Lancaster, MA

Average temperature - South Lancaster, MA

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (31.5°F).

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure
South Lancaster, MA

Average pressure - South Lancaster, MA

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed
South Lancaster, MA

Average wind speed - South Lancaster, MA

The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity
South Lancaster, MA

Average humidity - South Lancaster, MA

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (71%).

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Average rainfall
South Lancaster, MA

Average rainfall - South Lancaster, MA

The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.57").

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Average rainfall days
South Lancaster, MA

Average rainfall days - South Lancaster, MA

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (7.3 days).

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Average snowfall
South Lancaster, MA

Average snowfall - South Lancaster, MA

The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
South Lancaster, MA

Average snowfall days - South Lancaster, MA

The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
South Lancaster, MA

Average daylight / Average sunshine - South Lancaster, 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 6min).

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days
South Lancaster, MA

Average sunshine days - South Lancaster, MA

The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is July (12.8 days).

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Average UV index
South Lancaster, MA

Average UV index - South Lancaster, 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, November and December (UV index 2).

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Average visibility
South Lancaster, MA

Average visibility - South Lancaster, MA

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

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South Lancaster, Massachusetts, USA

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