Climate and monthly weather forecast
South Wellfleet, MA

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Weather in January

January, like December, in South Wellfleet, Massachusetts, is another cold winter month, with an average temperature ranging between min 31.6°F (-0.2°C) and max 38.7°F (3.7°C). January is South Wellfleet's coldest month, registering average high temperatures of 38.7°F (3.7°C) and lows of 31.6°F (-0.2°C). Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in South Wellfleet, Massachusetts, with temperature in the range of an average low of 31.6°F (-0.2°C) and an average high of 38.8°F (3.8°C). The advent of February brings an average high-temperature of a still wintry 38.8°F (3.8°C), almost identical to the preceding month. Weather in February »

Weather in March

March, the first month of the spring in South Wellfleet, is also a wintry month, with an average temperature fluctuating between 35.2°F (1.8°C) and 41°F (5°C). As South Wellfleet welcomes March, the average high-temperature is noted at a still icy 41°F (5°C), closely aligning with the preceding month. Weather in March »

Weather in April

April is a chilly spring month in South Wellfleet, Massachusetts, with an average temperature fluctuating between 46.8°F (8.2°C) and 42.3°F (5.7°C). April comes with a subtle rise, with the average high-temperature adjusting from a cold 41°F (5°C) in March to a frosty 46.8°F (8.2°C). Weather in April »

Weather in May

The last month of the spring, May, is a cool month in South Wellfleet, Massachusetts, with an average temperature varying between 54.3°F (12.4°C) and 49.8°F (9.9°C). May brings a slight elevation in the average high-temperature, transitioning from April's frosty 46.8°F (8.2°C) to a fresh 54.3°F (12.4°C). Weather in May »

Weather in June

June, the first month of the summer in South Wellfleet, is a refreshing month, with an average temperature ranging between max 62.4°F (16.9°C) and min 58.6°F (14.8°C). Entering June, South Wellfleet notices a subtle temperature elevation, with the average high-temperature advancing from May's fresh 54.3°F (12.4°C) to a refreshing 62.4°F (16.9°C). Weather in June »

Weather in July

July is a pleasant summer month in South Wellfleet, Massachusetts, with an average temperature fluctuating between 66.9°F (19.4°C) and 70.3°F (21.3°C). As July sets, the average high-temperature shows a slight increase, moving up from a refreshing 62.4°F (16.9°C) in June to an agreeable 70.3°F (21.3°C). Weather in July »

Weather in August

The last month of the summer, August, is another pleasant month in South Wellfleet, Massachusetts, with an average temperature fluctuating between 71.1°F (21.7°C) and 67.6°F (19.8°C). August is the warmest month, exhibiting average temperatures of 71.1°F (21.7°C) at the peak and 67.6°F (19.8°C) at the base. Weather in August »

Weather in September

The first month of the autumn, September, is still a refreshing month in South Wellfleet, Massachusetts, with an average temperature varying between 66.4°F (19.1°C) and 62.4°F (16.9°C). September begins with an average high-temperature of a refreshing 66.4°F (19.1°C), reflecting close similarity to the preceding month. Weather in September »

Weather in October

October, like September, is another refreshing autumn month in South Wellfleet, Massachusetts, with an average temperature varying between 54.7°F (12.6°C) and 59.2°F (15.1°C). As September transitions into October, South Wellfleet sees a gentle drop in the average high-temperature, transitioning from a refreshing 66.4°F (19.1°C) to a mild 59.2°F (15.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in South Wellfleet, Massachusetts, with an average temperature fluctuating between 50.9°F (10.5°C) and 45.5°F (7.5°C). South Wellfleet's transition into November involves a gentle shift in temperature, receding from a mild 59.2°F (15.1°C) in October 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 frosty month in South Wellfleet, Massachusetts, with an average temperature fluctuating between 37.4°F (3°C) and 43.9°F (6.6°C). Transitioning from November to December involves a subtle drop in average high-temperatures, descending from a cool 50.9°F (10.5°C) to a frosty 43.9°F (6.6°C). Weather in December »

Frequently asked questions

What part of the year is the coldest?

January, with its average high-temperature of 38.7°F (3.7°C) and an average low-temperature of 31.6°F (-0.2°C), holds the record as the coldest month.

How much does it rain in South Wellfleet?

Throughout the year, there are 136.1 rainfall days, and 17.24" (438mm) of precipitation is accumulated.

When does it snow in South Wellfleet?

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

How many days does it snow?

Throughout the year, there are 22.1 snowfall days, and 2.95" (75mm) of snow is accumulated.

When is the lowest UV index?

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

What is the driest month?

The months with the least rainfall are February and November Rain falls for 7.3 days and accumulates 1.18" (30mm) of rain.

When does it snow the most in South Wellfleet?

The month with the most snowfall is February, when snow falls for 5.2 days and typically aggregates up to 0.94" (24mm) 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.

When it does not snow?

May through October are months without snowfall.

When are the longest days?

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

What is the most humid month?

The most humid month in South Wellfleet is July, with an average relative humidity of 85%.

What are the months with the highest UV index?

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

What month is the hottest in South Wellfleet?

The month of August, characterized by an average high of 71.1°F (21.7°C) and a low of 67.6°F (19.8°C), is recognized as the warmest.

What month has the most sunshine?

With an average of 10.6h of sunshine, August has the most sunshine of the year.

What is the rainiest month?

The month with the most rainfall is October, when the rain falls for 12.5 days and typically aggregates up to 2.17" (55mm) of precipitation.

What is the least humid month?

The least humid month is November, with an average relative humidity of 74%.

What is the month with the shortest days?

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

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 4.2h of sunshine.

Average temperature
South Wellfleet, MA

Average temperature - South Wellfleet, MA

The warmest month (with the highest average high temperature) is August (71.1°F).
The month with the lowest average high temperature is January (38.7°F).

The month with the highest average low temperature is August (67.6°F).
The coldest months (with the lowest average low temperature) are January and February (31.6°F).

Average pressure
South Wellfleet, MA

Average pressure - South Wellfleet, MA

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
South Wellfleet, MA

Average wind speed - South Wellfleet, MA

The windiest month (with the highest average wind speed) is January (18.5mph).
The calmest months (with the lowest average wind speed) are July and August (11.6mph).

Average humidity
South Wellfleet, MA

Average humidity - South Wellfleet, MA

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is November (74%).

Average rainfall
South Wellfleet, MA

Average rainfall - South Wellfleet, MA

The wettest month (with the highest rainfall) is October (2.17").
The driest months (with the least rainfall) are February and November (1.18").

Average rainfall days
South Wellfleet, MA

Average rainfall days - South Wellfleet, MA

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (7.3 days).

Average snowfall
South Wellfleet, MA

Average snowfall - South Wellfleet, MA

The month with the highest snowfall is February (0.94").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
South Wellfleet, MA

Average snowfall days - South Wellfleet, MA

The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
South Wellfleet, MA

Average daylight / Average sunshine - South Wellfleet, 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 month with the least sunshine is December (Average sunshine: 4h and 12min).

Average sunshine days
South Wellfleet, MA

Average sunshine days - South Wellfleet, MA

The month with the most sunshine days is August (18.2 days).
The month with the least sunshine days is December (13.1 days).

Average UV index
South Wellfleet, MA

Average UV index - South Wellfleet, MA

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

Average visibility
South Wellfleet, MA

Average visibility - South Wellfleet, 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).

South Wellfleet, Massachusetts, USA

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