Hyannis
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Hyannis, MA

January, like December, in Hyannis, Massachusetts, is a wintry winter month, with average temperature ranging between min 30.4°F (-0.9°C) and max 38.3°F (3.5°C). January is the coldest month, 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 »

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

The first month of the spring, March, is also a wintry month in Hyannis, Massachusetts, with average temperature varying between 35.2°F (1.8°C) and 41.5°F (5.3°C). In Hyannis, Massachusetts, the average high-temperature in March is relatively the same as in February - a still wintry 41.5°F (5.3°C). Weather in March »

April in Hyannis, Massachusetts, is a chilly spring month, with average temperature fluctuating between 42.4°F (5.8°C) and 47.1°F (8.4°C). In Hyannis, Massachusetts, the average high-temperature in April 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 »

May, the last month of the spring, in Hyannis, is a moderate month, with average temperature ranging between max 55.4°F (13°C) and min 50.9°F (10.5°C). In May, the average high-temperature slightly increases, from a chilly 47.1°F (8.4°C) in April, to a mild 55.4°F (13°C). Weather in May »

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

July is a pleasant summer month in Hyannis, Massachusetts, with average temperature ranging between min 67.6°F (19.8°C) and max 72°F (22.2°C). In July, the average high-temperature slightly increases, from a comfortable 63.9°F (17.7°C) in June, to a pleasant 72°F (22.2°C). Weather in July »

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

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

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

November, the last month of the autumn, in Hyannis, is also a fresh month, with temperature in the range of an average high of 51.3°F (10.7°C) and an average low of 45°F (7.2°C). In Hyannis, the average high-temperature in November marginally drops, from a moderate 59.9°F (15.5°C) in October, to a fresh 51.3°F (10.7°C). Weather in November »

December, the first month of the winter, in Hyannis, is still a chilly month, with average temperature varying between 43.7°F (6.5°C) and 36.5°F (2.5°C). In December, the average high-temperature slightly decreases, from a cool 51.3°F (10.7°C) in November, to a frosty 43.7°F (6.5°C). Weather in December »

What is the coldest month in Hyannis?

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

How much does it rain in Hyannis?

In Hyannis, Massachusetts, 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.

How much does it snow in Hyannis?

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

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

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

When does it snow the most 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.

What month 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 it does not snow in Hyannis?

In Hyannis snow does not fall in May through November.

When are the longest days in Hyannis?

June has the longest days of the year in Hyannis, with an average of 15.2h of daylight.

What is the most humid month in Hyannis?

July is the most humid month in Hyannis, Massachusetts, with an average relative humidity of 84%.

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 in Hyannis.

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. Rain falls for 12.4 days and accumulates 1.73" (44mm) of precipitation.

What month is the ocean warmest in Hyannis?

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

What month has the most sunshine in Hyannis?

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

What is the wettest month in Hyannis?

October is the month with the most rainfall. 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 is November, with an average relative humidity of 74%.

What is the month with the shortest days in Hyannis?

December has the shortest days of the year, with an average of 9.2h of daylight.

What is the month with the least sunshine in Hyannis?

The month with the least sunshine in Hyannis is December, with an average of 4.6h of sunshine.
Average temperature - Hyannis, MA
Average rainfall - Hyannis, MA

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

Average rainfall days - Hyannis, MA

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

Average snowfall - Hyannis, MA

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

Average snowfall days - Hyannis, MA

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

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).

Average daylight / Average sunshine - Hyannis, MA

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).

The month with most sunshine is August (Average sunshine: 10.8h).
The month with least sunshine is December (Average sunshine: 4.6h).

Average UV index - Hyannis, MA