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 onset of April brings a minor temperature shift, with the average high-temperature moving from a wintry 41°F (5°C) in March to a chilly 46.9°F (8.3°C). Nighttime temperatures during April report a consistent average of 42.4°F (5.8°C).Humidity
In Chatham, Massachusetts, the average relative humidity in April is 80%.Rainfall
In Chatham, in April, during 13.1 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In Chatham, during the entire year, the rain falls for 142.4 days and collects up to 22.09" (561mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. April is the last month it regularly snows. During 0.8 snowfall days, in April, Chatham aggregates 0.04" (1mm) of snow. Throughout the year, there are 20.8 snowfall days, and 4.37" (111mm) of snow is accumulated.Ocean temperature
In Chatham, in April, the average water temperature is 43.2°F (6.2°C).Note: Dipping in 43.2°F (6.2°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In Chatham, the average length of the day in April is 13h and 22min.On the first day of April, sunrise is at 6:21 am and sunset at 7:05 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 7:37 pm EDT.
Sunshine
In April, the average sunshine is 8.3h.UV index
In Chatham, the average daily maximum UV index in April is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 during April translates into the following directions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April?
What is the average humidity in April?
How many days does it rain in April?
What is the last month it snows in Chatham?
What is the water temperature in April?
What is the average length of the day in April?
When is the sunrise / sunset in April in Chatham?
How many hours of sunshine does Chatham have in April?
How high is the UV index in April?
Average temperature in April
Chatham, MA
- Average high temperature in April: 46.9°F
The warmest month (with the highest average high temperature) is August (71.6°F).
The months with the lowest average high temperature are January and February (39°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 (31.6°F).
Average pressure in April
Chatham, 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
Chatham, MA
- Average wind speed in April: 15.2mph
The windiest month (with the highest average wind speed) is January (18mph).
The calmest month (with the lowest average wind speed) is August (11.4mph).
Average humidity in April
Chatham, MA
- Average humidity in April: 80%
The months with the highest relative humidity are June and July (85%).
The month with the lowest relative humidity is November (74%).
Average rainfall in April
Chatham, MA
- Average rainfall in April: 2.05"
The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is November (1.46").
Average rainfall days in April
Chatham, MA
- Average rainfall days in April: 13.1 days
The month with the highest number of rainy days is May (14.6 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in April
Chatham, MA
- Average snowfall in April: 0.04"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Chatham, 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, September and October (0 days).
Average sea temperature in April
Chatham, MA
- Average sea temperature in April: 43.2°F
The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is March (39.8°F).
Average daylight in April /
Average sunshine in April
Chatham, 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 month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in April
Chatham, MA
- Average sunshine days in April: 14.5 days
The month with the most sunshine days is August (17.6 days).
The month with the least sunshine days is January (13 days).
Average UV index in April
Chatham, 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
Chatham, MA
- Average cloud cover in April: 46
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in April
Chatham, 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).
Chatham, Massachusetts, USA
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