Climate and monthly weather forecast
Hyannis, MA

Weather in January

January, like December, in Hyannis, Massachusetts, is a wintry winter month, with temperature in the range of an average low of 30.4°F (-0.9°C) and an average high of 38.3°F (3.5°C). The coldest month is January, with an average high-temperature of 38.3°F (3.5°C) and an average low-temperature of 30.4°F (-0.9°C). Weather in January »

Weather in February

February, the last month of the winter in Hyannis, is another cold month, with an average temperature varying between 30.9°F (-0.6°C) and 38.8°F (3.8°C). In Hyannis, the average high-temperature in February is almost the same as in January - a still wintry 38.8°F (3.8°C). Weather in February »

Weather in March

March, the first month of the spring in Hyannis, is also a wintry month, with an average temperature ranging between max 41.5°F (5.3°C) and min 35.2°F (1.8°C). In Hyannis, the average high-temperature in March is almost the same as in February - a still cold 41.5°F (5.3°C). Weather in March »

Weather in April

April in Hyannis, Massachusetts, is a chilly spring month, with an average temperature fluctuating between 42.4°F (5.8°C) and 47.1°F (8.4°C). In April, the average high-temperature slightly increases from a cold 41.5°F (5.3°C) in March to a chilly 47.1°F (8.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderate month in Hyannis, Massachusetts, with an average temperature fluctuating between 55.4°F (13°C) and 50.9°F (10.5°C). In May, the average high-temperature slightly increases from a frosty 47.1°F (8.4°C) in April to a moderate 55.4°F (13°C). Weather in May »

Weather in June

The first month of the summer, June, is a comfortable month in Hyannis, Massachusetts, with an average temperature fluctuating between 63.9°F (17.7°C) and 59.4°F (15.2°C). In Hyannis, the average high-temperature in June slightly increases from a mild 55.4°F (13°C) in May to a comfortable 63.9°F (17.7°C). Weather in June »

Weather in July

July in Hyannis, Massachusetts, is a pleasant summer month, with temperature in the range of an average high of 72°F (22.2°C) and an average low of 67.6°F (19.8°C). In July, the average high-temperature marginally rises from an enjoyable 63.9°F (17.7°C) in June to a pleasant 72°F (22.2°C). Weather in July »

Weather in August

The last month of the summer, August, is also an agreeable month in Hyannis, Massachusetts, with an average temperature fluctuating between 68.2°F (20.1°C) and 72.5°F (22.5°C). With an average high-temperature of 72.5°F (22.5°C) and an average low-temperature of 68.2°F (20.1°C), August is the warmest month. Weather in August »

Weather in September

The first month of the autumn, September, is also an enjoyable month in Hyannis, Massachusetts, with an average temperature varying between 67.3°F (19.6°C) and 62.8°F (17.1°C). In Hyannis, the average high-temperature in September is practically the same as in August - an enjoyable 67.3°F (19.6°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Hyannis, Massachusetts, with an average temperature varying between 54.5°F (12.5°C) and 59.9°F (15.5°C). In Hyannis, Massachusetts, the average high-temperature in October slightly decreases from an enjoyable 67.3°F (19.6°C) in September to a moderate 59.9°F (15.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Hyannis, Massachusetts, with an average temperature fluctuating between 51.3°F (10.7°C) and 45°F (7.2°C). In Hyannis, the average high-temperature in November slightly decreases from a moderate 59.9°F (15.5°C) in October to a fresh 51.3°F (10.7°C). Weather in November »

Weather in December

December, the first month of the winter in Hyannis, is also a frosty month, with temperature in the range of an average high of 43.7°F (6.5°C) and an average low of 36.5°F (2.5°C). In Hyannis, the average high-temperature in December marginally drops from a cool 51.3°F (10.7°C) in November to a frosty 43.7°F (6.5°C). Weather in December »
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FAQ

What is the coldest month in Hyannis?

With an average high-temperature of 38.3°F (3.5°C) and an average low-temperature of 30.4°F (-0.9°C), January is the coldest month in Hyannis, Massachusetts.

How much does it rain in Hyannis?

In Hyannis, during the entire year, the rain falls for 157.2 days and collects up to 31.77" (807mm) of precipitation.

When does it snow in Hyannis?

January through April and December are months with snowfall in Hyannis.

How many days does it snow in Hyannis?

Throughout the year, in Hyannis, there are 24.1 snowfall days, and 6.1" (155mm) of snow is accumulated.

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

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

What is the snowiest month in Hyannis?

The month with the most snowfall is March, when snow falls for 5.2 days and typically aggregates up to 1.93" (49mm) of snow.

When is the ocean coldest in Hyannis?

The month with the coldest seawater is March, with an average ocean temperature of 39°F (3.9°C).

When is Daylight Saving Time (DST) in Hyannis?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Hyannis?

In Hyannis, Massachusetts, snow does not fall in May through November.

When are the longest days in Hyannis?

The month with the longest days is June, with an average of 15h and 9min of daylight.

What is the most humid month in Hyannis?

With an average relative humidity of 84%, July is the most humid month.

What is the month with the highest UV index in Hyannis?

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

What is the warmest month in Hyannis?

August is the warmest month in Hyannis, Massachusetts, with an average high-temperature of 72.5°F (22.5°C) and an average low-temperature of 68.2°F (20.1°C).

What is the driest month in Hyannis?

August is the month with the least rainfall in Hyannis. Rain falls for 12.4 days and accumulates 1.73" (44mm) of precipitation.

When is the ocean warmest in Hyannis?

With an average ocean temperature of 67.5°F (19.7°C), August is the month with the warmest seawater in Hyannis, Massachusetts.

What month has the most sunshine in Hyannis?

With an average of 10.8h of sunshine, August has the most sunshine of the year in Hyannis.

What is the wettest month in Hyannis?

October is the month with the most rainfall in Hyannis. Rain falls for 14.5 days and accumulates 3.7" (94mm) of precipitation.

What is the least humid month in Hyannis?

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

What is the month with the shortest days in Hyannis?

With an average of 9h and 13min of daylight, December has the shortest days of the year.

What is the month with the least sunshine in Hyannis?

With an average of 4.6h of sunshine, December has the least sunshine of the year in Hyannis, Massachusetts.

Average temperature
Hyannis, MA

Average temperature - Hyannis, MA

The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is January (38.3°F).

The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).

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Average pressure
Hyannis, MA

Average pressure - Hyannis, 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).

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Average wind speed
Hyannis, MA

Average wind speed - Hyannis, MA

The windiest month (with the highest average wind speed) is January (16.5mph).
The calmest month (with the lowest average wind speed) is August (10.6mph).

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Average rainfall
Hyannis, MA

Average rainfall - Hyannis, MA

The wettest month (with the highest rainfall) is October (3.7").
The driest month (with the least rainfall) is August (1.73").

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Average rainfall days
Hyannis, MA

Average rainfall days - Hyannis, MA

The month with the highest number of rainy days is April (15.8 days).
The month with the least rainy days is February (10.3 days).

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Average snowfall
Hyannis, MA

Average snowfall - Hyannis, MA

The month with the highest snowfall is March (1.93").
The months with the least snowfall are May, June, July, August, September, October and November (0").

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Average snowfall days
Hyannis, MA

Average snowfall days - Hyannis, MA

The month with the highest number of snowfall days is February (7.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature
Hyannis, MA

Average sea temperature - Hyannis, MA

The best month for swimming (with the highest average sea temperature) is August (67.5°F).
The coldest month (with the lowest average sea temperature) is March (39°F).

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Average daylight / Average sunshine
Hyannis, MA

Average daylight / Average sunshine - Hyannis, MA

The month with the longest days is June (Average daylight: 15h and 9min).
The month with the shortest days is December (Average daylight: 9h and 13min).

The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

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Average sunshine days
Hyannis, MA

Average sunshine days - Hyannis, MA

The month with the most sunshine days is August (17.7 days).
The month with the least sunshine days is February (11.4 days).

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Average UV index
Hyannis, MA

Average UV index - Hyannis, 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).

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Average visibility
Hyannis, MA

Average visibility - Hyannis, 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).

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