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 shift into April is characterized by a rise in the average high-temperature, transitioning from March's chilly 43.5°F (6.4°C) to a fresh 55.2°F (12.9°C). Chelsea temperatures generally rest at a low of 40.5°F (4.7°C) during the April nights.Humidity
April is the least humid month, with an average relative humidity of 69%.Rainfall
The months with the most rainfall are March, April and December, with an average 2.91" (74mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Chelsea, in April, during 1 snowfall days, 0.79" (20mm) of snow is typically accumulated. In Chelsea, during the entire year, snow falls for 29.8 days and aggregates up to 15.75" (400mm) of snow.Ocean temperature
In April, the average ocean temperature is 43.2°F (6.2°C).Note: Diving into 43.2°F (6.2°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
In April, the average length of the day is 13h and 24min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:10 pm. On the last day of April, sunrise is at 5:39 am and sunset at 7:43 pm EDT.
Sunshine
In Chelsea, the average sunshine in April is 8h.UV index
In April, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 3 in April transforms into the following instructions:
Put precautions into practice - Protective measures against sun-induced damage are advised. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Boost your sun resistance with garments that are densely woven yet spacious. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average April temperature?
What is the least humid month?
What is the average humidity in April?
What is the wettest month?
How much does it rain in April?
How much does it snow in April?
What is the ocean temperature in April?
What is the average length of the day in April?
When are sunrise and sunset in April?
How many hours of sunshine does Chelsea have in April?
How high is the UV index in April?
Average temperature in April
Chelsea, MA
- Average high temperature in April: 55.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in April: 40.5°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in April
Chelsea, MA
- Average pressure in April: 29.97"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
Chelsea, MA
- Average wind speed in April: 8.6mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in April
Chelsea, MA
- Average humidity in April: 69%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (69%).
Average rainfall in April
Chelsea, MA
- Average rainfall in April: 2.91"
The wettest months (with the highest rainfall) are March, April and December (2.91").
The driest month (with the least rainfall) is September (1.26").
Average rainfall days in April
Chelsea, MA
- Average rainfall days in April: 14.8 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in April
Chelsea, MA
- Average snowfall in April: 0.79"
The month with the highest snowfall is February (4.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Chelsea, MA
- Average snowfall days in April: 1 days
The months with the highest number of snowfall days are January and February (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in April
Chelsea, MA
- Average sea temperature in April: 43.1°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight in April /
Average sunshine in April
Chelsea, 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 6min).
- Average sunshine in April: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in April
Chelsea, MA
- Average sunshine days in April: 13 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in April
Chelsea, MA
- Average UV index in April: 3
The months with the highest UV index are June, 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
Chelsea, MA
- Average cloud cover in April: 47
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in April
Chelsea, 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).
Chelsea, Massachusetts, USA
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