April weather forecast and climate
South Yarmouth, MA

Weather in April

April is a frosty spring month in South Yarmouth, Massachusetts, with average temperature fluctuating between 47.1°F (8.4°C) and 42.4°F (5.8°C).

Temperature

In April, the average high-temperature slightly increases, from a cold 41.4°F (5.2°C) in March, to a chilly 47.1°F (8.4°C). In South Yarmouth, the average low-temperature is 42.4°F (5.8°C).

Humidity

In April, the average relative humidity in South Yarmouth, Massachusetts, is 79%.

Rainfall

In April, the rain falls for 12.3 days. Throughout April, 1.34" (34mm) of precipitation is accumulated. Throughout the year, in South Yarmouth, there are 129 rainfall days, and 14.21" (361mm) of precipitation is accumulated.

Snowfall

January through April and December are months with snowfall. April is the last month it regularly snows in South Yarmouth. During 0.4 snowfall days, in April, South Yarmouth aggregates 0.04" (1mm) of snow. Throughout the year, there are 20.8 snowfall days, and 2.6" (66mm) of snow is accumulated.

Ocean temperature

In South Yarmouth, in April, the average water temperature is 43.5°F (6.4°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The average length of the day in April is 13.4h.

Sunshine

In South Yarmouth, Massachusetts, the average sunshine is 8.4h.

UV index

The average daily maximum UV index in South Yarmouth is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 3 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in April in South Yarmouth?

The average relative humidity in April in South Yarmouth is 79%.

How many days does it rain in April in South Yarmouth?

In South Yarmouth, Massachusetts, in April, during 12.3 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

What is the last month it snows in South Yarmouth?

April is the last month it regularly snows in South Yarmouth. During 0.4 snowfall days, in April, South Yarmouth aggregates 0.04" (1mm) of snow.

What is the ocean temperature in April in South Yarmouth?

In South Yarmouth, the average seawater temperature in April is 43.5°F (6.4°C). Swimming in 43.5°F (6.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does South Yarmouth have in April?

The average length of the day in April is 13.4h.

How many hours of sunshine does South Yarmouth have in April?

In South Yarmouth, Massachusetts, the average sunshine in April is 8.4h.

What is the UV index intensity in April in South Yarmouth?

In April, the average daily maximum UV index in South Yarmouth, Massachusetts, is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in April
South Yarmouth, MA

Average temperature in April - South Yarmouth, MA
  • Average high temperature in April: 47.1°F

The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (38.5°F).

  • Average low temperature in April: 42.4°F

The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in April
South Yarmouth, MA

Average pressure in April - South Yarmouth, MA
  • Average pressure in April: 29.98"

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

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Average wind speed in April
South Yarmouth, MA

Average wind speed in April - South Yarmouth, MA
  • Average wind speed in April: 14.4mph

The windiest month (with the highest average wind speed) is January (16.8mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).

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Average humidity in April
South Yarmouth, MA

Average humidity in April - South Yarmouth, MA
  • Average humidity in April: 79%

Months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (74%).

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Average rainfall in April
South Yarmouth, MA

Average rainfall in April - South Yarmouth, MA
  • Average rainfall in April: 1.34"

The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is August (0.94").

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Average rainfall days in April
South Yarmouth, MA

Average rainfall days in April - South Yarmouth, MA
  • Average rainfall days in April: 12.3 days

The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is February (8.3 days).

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Average snowfall in April
South Yarmouth, MA

Average snowfall in April - South Yarmouth, MA
  • Average snowfall in April: 0.04"

The month with the highest snowfall is January (0.87").
Months with the least snowfall are May, June, July, August, September, October and November (0").

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Average snowfall days in April
South Yarmouth, MA

Average snowfall days in April - South Yarmouth, MA
  • Average snowfall days in April: 0.4 days

The month with the highest number of snowfall days is January (6.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in April
South Yarmouth, MA

Average sea temperature in April - South Yarmouth, MA
  • Average sea temperature in April: 43.5°F

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 in April /
Average sunshine in April
South Yarmouth, MA

Average daylight in April / Average sunshine in April - South Yarmouth, MA
  • Average daylight in April: 13.4h

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

  • Average sunshine in April: 8.4h

The month with the most sunshine is August (Average sunshine: 10.8h).
Months with the least sunshine are February and December (Average sunshine: 4.6).

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Average sunshine days in April
South Yarmouth, MA

Average sunshine days in April - South Yarmouth, MA
  • Average sunshine days in April: 15.3 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (14.3 days).

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Average UV index in April
South Yarmouth, MA

Average UV index in April - South Yarmouth, MA
  • Average UV index in April: 3

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

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Average cloud cover in April
South Yarmouth, MA

Average cloud cover in April - South Yarmouth, MA
  • Average cloud cover in April: 45

The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in April
South Yarmouth, MA

Average visibility in April - South Yarmouth, MA
  • Average visibility in April: 6mi

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

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