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
The start of April brings a subtle rise in the average high-temperature, moving from a cold 41.5°F (5.3°C) in March to a chilly 47.1°F (8.4°C). An average temperature of 42.4°F (5.8°C) is logged during the nights of April, a small step down from daytime highs.Humidity
In Hyannis, the average relative humidity in April is 79%.Rainfall
In Hyannis, in April, it is raining for 15.8 days, with typically 3.03" (77mm) of accumulated precipitation. In Hyannis, during the entire year, the rain falls for 157.2 days and collects up to 31.77" (807mm) of precipitation.Snowfall
Months with snowfall are January through April and December. April is the last month it regularly snows. During 0.6 snowfall days, in April, Hyannis aggregates 0.12" (3mm) of snow. In Hyannis, during the entire year, snow falls for 24.1 days and aggregates up to 6.1" (155mm) of snow.Ocean temperature
In Hyannis, in April, the average water temperature is 43.5°F (6.4°C).Note: Dipping in 43.5°F (6.4°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In April, the average length of the day in Hyannis is 13h and 22min.On the first day of April, sunrise is at 6:22 am and sunset at 7:06 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 7:38 pm EDT.
Sunshine
In Hyannis, the average sunshine in April is 8.4h.UV index
In April, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: During April, 3 as the daily maximum UV index converts into the following advice:
Undertake precautions - Guarding against sun damage is counselled. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Experience reduced UV exposure by about half when donning a wide-brim hat. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Hyannis in April?
What is the average humidity in April in Hyannis?
How much does it rain in April?
What is the last month it snows?
How cold is the water in April?
What is the average length of the day in April in Hyannis?
When is the sunrise / sunset in April?
How many hours of sunshine does Hyannis have in April?
How high is the UV index in April?
Average temperature in April
Hyannis, MA
- Average high temperature in April: 47.1°F
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).
- Average low temperature in April: 42.4°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).
Average pressure in April
Hyannis, 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
Hyannis, MA
- Average wind speed in April: 14.1mph
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).
Average humidity in April
Hyannis, MA
- Average humidity in April: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is November (74%).
Average rainfall in April
Hyannis, MA
- Average rainfall in April: 3.03"
The wettest month (with the highest rainfall) is October (3.7").
The driest month (with the least rainfall) is August (1.73").
Average rainfall days in April
Hyannis, MA
- Average rainfall days in April: 15.8 days
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).
Average snowfall in April
Hyannis, MA
- Average snowfall in April: 0.12"
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").
Average snowfall days in April
Hyannis, MA
- Average snowfall days in April: 0.6 days
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).
Average sea temperature in April
Hyannis, 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).
Average daylight in April /
Average sunshine in April
Hyannis, MA
- Average daylight in April: 13h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
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 48min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in April
Hyannis, MA
- Average sunshine days in April: 12.7 days
The month with the most sunshine days is August (17.7 days).
The month with the least sunshine days is February (11.4 days).
Average UV index in April
Hyannis, 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
Hyannis, MA
- Average cloud cover in April: 45
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in April
Hyannis, 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).
Hyannis, Massachusetts, USA
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