April weather forecast
Onset, MA

Share

Weather in April

April in Onset, Massachusetts, is a cool spring month, with an average temperature ranging between min 41.9°F (5.5°C) and max 50.5°F (10.3°C).

Temperature

Entering April, Onset notices a subtle temperature elevation, with the average high-temperature advancing from March's icy 42.3°F (5.7°C) to a cool 50.5°F (10.3°C). April nights in Onset reflect a consistent temperature dip to an icy 41.9°F (5.5°C), a slight descent from daytime peaks.

Humidity

The average relative humidity in April is 76%.

Rainfall

In Onset, Massachusetts, in April, it is raining for 15.9 days, with typically 3.03" (77mm) of accumulated precipitation. In Onset, during the entire year, the rain falls for 157.4 days and collects up to 32.2" (818mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. April is the last month it regularly snows in Onset. During 0.8 snowfall days, in April, Onset aggregates 0.24" (6mm) of snow. Throughout the year, there are 21.7 snowfall days, and 8.43" (214mm) of snow is accumulated.

Ocean temperature

In Onset, the average seawater temperature in April is 43.9°F (6.6°C).
Note: Beware of 43.9°F (6.6°C) waters at 55.4°F (13°C), they're uninviting, and a dip below 50°F (10°C) has risks of breath loss and cold shock, contingent on health.

Daylight

The average length of the day in April is 13h and 22min.
On the first day of the month, sunrise is at 6:24 am and sunset at 7:08 pm. On the last day of April, sunrise is at 5:39 am and sunset at 7:40 pm EDT.

Sunshine

The average sunshine in April in Onset is 8.3h.

UV index

In Onset, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily high UV index of 3 in April leads to these guidelines:
Act with care - The need to guard against sun damage is communicated. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
[Resources]

Frequently asked questions

What is the average April temperature in Onset?

In April, in Onset, the average high-temperature is 50.5°F (10.3°C), and the average low-temperature is 41.9°F (5.5°C).

What is the average humidity in April in Onset?

In Onset, Massachusetts, the average relative humidity in April is 76%.

How much does it rain in Onset in April?

In Onset, in April, it is raining for 15.9 days, with typically 3.03" (77mm) of accumulated precipitation.

What is the last month it snows in Onset?

April is the last month it regularly snows. During 0.8 snowfall days, in April, Onset aggregates 0.24" (6mm) of snow.

What is the water temperature in April in Onset?

In Onset, Massachusetts, the average seawater temperature in April is 43.9°F (6.6°C). Swimming in 43.9°F (6.6°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in April in Onset?

In Onset, Massachusetts, the average day length in April is 13h and 22min.

When are sunrise and sunset in April in Onset?

On the first day of April in Onset, sunrise is at 6:24 am and sunset at 7:08 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 7:40 pm EDT.

How long on average sun shines in April in Onset?

The average sunshine duration in April in Onset is 8.3h.

How high is the UV index in April in Onset?

In Onset, Massachusetts, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Onset, MA

Average temperature in April - Onset, MA
  • Average high temperature in April: 50.5°F

The warmest month (with the highest average high temperature) is July (75.6°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in April: 41.9°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

[Resources]

Average pressure in April
Onset, MA

Average pressure in April - Onset, MA
  • Average pressure in April: 29.98"Hg

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

[Resources]

Average wind speed in April
Onset, MA

Average wind speed in April - Onset, MA
  • Average wind speed in April: 11.7mph

The windiest month (with the highest average wind speed) is January (13.7mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

[Resources]

Average humidity in April
Onset, MA

Average humidity in April - Onset, MA
  • Average humidity in April: 76%

The months with the highest relative humidity are June and July (81%).
The months with the lowest relative humidity are March and November (74%).

[Resources]

Average rainfall in April
Onset, MA

Average rainfall in April - Onset, MA
  • Average rainfall in April: 3.03"

The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is September (1.81").

[Resources]

Average rainfall days in April
Onset, MA

Average rainfall days in April - Onset, MA
  • Average rainfall days in April: 15.9 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (9 days).

[Resources]

Average snowfall in April
Onset, MA

Average snowfall in April - Onset, MA
  • Average snowfall in April: 0.24"

The months with the highest snowfall are February and March (2.28").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in April
Onset, MA

Average snowfall days in April - Onset, MA
  • Average snowfall days in April: 0.8 days

The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

[Resources]

Average sea temperature in April
Onset, MA

Average sea temperature in April - Onset, MA
  • Average sea temperature in April: 44°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

[Resources]

Average daylight in April /
Average sunshine in April
Onset, MA

Average daylight in April / Average sunshine in April - Onset, MA
  • Average daylight in April: 13h and 2min

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).

  • Average sunshine in April: 8h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

[Resources]

Average sunshine days in April
Onset, MA

Average sunshine days in April - Onset, MA
  • Average sunshine days in April: 12.5 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is April (12.5 days).

[Resources]

Average UV index in April
Onset, MA

Average UV index in April - Onset, MA
  • Average UV index in April: 3

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).

[Resources]

Average cloud cover in April
Onset, MA

Average cloud cover in April - Onset, MA
  • Average cloud cover in April: 45

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

[Resources]

Average visibility in April
Onset, MA

Average visibility in April - Onset, MA
  • Average visibility in April: 6mi

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).

[Resources]

Onset, Massachusetts, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location