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's arrival signals an increase in average high-temperatures, moving from March's frosty 45°F (7.2°C) to a mild 55.4°F (13°C). April nights observe an average temperature dip to a chilly 43.5°F (6.4°C).Humidity
The average relative humidity in April is 72%.Rainfall
In Cos Cob, in April, it is raining for 15.5 days, with typically 3.11" (79mm) of accumulated precipitation. In Cos Cob, during the entire year, the rain falls for 165.6 days and collects up to 37.64" (956mm) of precipitation.Snowfall
Months with snowfall in Cos Cob are January through April, November and December. April is the last month it regularly snows in Cos Cob, Connecticut. During 0.5 snowfall days, in April, Cos Cob aggregates 0.08" (2mm) of snow. Throughout the year, in Cos Cob, there are 25.5 snowfall days, and 8.78" (223mm) of snow is accumulated.Ocean temperature
In Cos Cob, the average seawater temperature in April is 44.2°F (6.8°C).Note: Diving into 44.2°F (6.8°C) is practical below 50°F (10°C), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 55.4°F (13°C) feels ice-cold.
Daylight
The average length of the day in April is 13h and 20min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:19 pm. On the last day of April, sunrise is at 5:52 am and sunset at 7:50 pm EDT.
Sunshine
In Cos Cob, the average sunshine in April is 8.2h.UV index
In April, the average daily maximum UV index in Cos Cob is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 3 during April leads to these advisories:
Prioritize safety - Recommendations to avert sunburn are shared. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Cos Cob in April?
What is the average humidity in April in Cos Cob?
How many days does it rain in April in Cos Cob?
What is the last month it snows in Cos Cob?
How cold is the water in April in Cos Cob?
How many hours of daylight does Cos Cob have in April?
What time are sunrise and sunset in April in Cos Cob?
How many hours of sunshine does Cos Cob have in April?
What is the UV index reading in April in Cos Cob?
Average temperature in April
Cos Cob, CT
- Average high temperature in April: 55.4°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in April: 43.5°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in April
Cos Cob, CT
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Cos Cob, CT
- Average wind speed in April: 9.1mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in April
Cos Cob, CT
- Average humidity in April: 72%
The months with the highest relative humidity are February, May and December (75%).
The month with the lowest relative humidity is August (71%).
Average rainfall in April
Cos Cob, CT
- Average rainfall in April: 3.11"
The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.4").
Average rainfall days in April
Cos Cob, CT
- Average rainfall days in April: 15.5 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (7.9 days).
Average snowfall in April
Cos Cob, CT
- Average snowfall in April: 0.08"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Cos Cob, CT
- Average snowfall days in April: 0.5 days
The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in April
Cos Cob, CT
- Average sea temperature in April: 44.3°F
The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).
Average daylight in April /
Average sunshine in April
Cos Cob, CT
- 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 18min).
- Average sunshine in April: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in April
Cos Cob, CT
- Average sunshine days in April: 12.7 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in April
Cos Cob, CT
- 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
Cos Cob, CT
- Average cloud cover in April: 45
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in April
Cos Cob, CT
- 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).
Cos Cob, Connecticut, USA
Weather forecast for your location
2. Allow the app to use your location