Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average sea temperature in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
April brings a slight rise in Onset's average high-temperature, moving from a wintry 42.3°F (5.7°C) in March to a cool 50.5°F (10.3°C). Onset's April nights experience a subtle temperature dip to an average of 41.9°F (5.5°C).Humidity
In April, the average relative humidity is 76%.Rainfall
In April, the rain falls for 15.9 days. Throughout April, 3.03" (77mm) of precipitation is accumulated. In Onset, during the entire year, the rain falls for 157.4 days and collects up to 32.2" (818mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. April is the last month it regularly snows. 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, in April, the average water temperature is 43.9°F (6.6°C).Note: Without suitable protection, venturing into 43.9°F (6.6°C) waters cooler than 50°F (10°C) can lead to pronounced cold shock and rapid breaths.
Daylight
The average length of the day in April is 13h and 22min.On the first day of April, 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.
Sunshine
In Onset, the average sunshine in April is 8.3h.UV index
The average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 3 during April leads to these advisories:
Put precautions into practice - Protective measures against sun-induced damage are advised. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What is the average humidity in April?
How much does it rain in April?
What is the last month it snows?
What is the water temperature in April?
What is the average length of the day in April?
What time are sunrise and sunset in April?
How many hours of sunshine does Onset have in April?
What is the UV index reading in April?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
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).
Onset, Massachusetts, USA
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