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
With the onset of April, Groton's weather sees a temperature rise, transitioning from a chilly 43.3°F (6.3°C) in March to a fresh 53.4°F (11.9°C). Groton encounters an average low-temperature of 42.4°F (5.8°C) during April nights.Humidity
January, March, April and November, with an average relative humidity of 74%, are the least humid months.Rainfall
In Groton, in April, during 14.9 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. In Groton, during the entire year, the rain falls for 159.8 days and collects up to 33.07" (840mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 0.7 snowfall days, in April, Groton aggregates 0.08" (2mm) of snow. Throughout the year, there are 24 snowfall days, and 7.68" (195mm) of snow is accumulated.Ocean temperature
In Groton, the average seawater temperature in April is 44.4°F (6.9°C).Note: Navigating the 44.4°F (6.9°C) at 55.4°F (13°C) is no joy, and temperatures less than 50°F (10°C) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
In April, the average length of the day is 13h and 21min.On the first day of April, sunrise is at 6:30 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 5:45 am and sunset at 7:45 pm EDT.
Sunshine
The average sunshine in April is 8.4h.UV index
In Groton, the average daily maximum UV index in April is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 3 in April translates into the following instructions:
Take necessary precautions - Suggestions to elude sunburn are provided. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in April in Groton?
What are the least humid months?
What is the average humidity in April?
How many days does it rain in April?
What is the last month it snows in Groton?
How cold is the water in April?
What is the average length of the day in April in Groton?
What time are sunrise and sunset in April?
How many hours of sunshine does Groton have in April?
What is the UV index intensity in April?
Average temperature in April
Groton, CT
- Average high temperature in April: 53.4°F
The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in April: 42.4°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in April
Groton, CT
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
Groton, CT
- Average wind speed in April: 10.6mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.8mph).
Average humidity in April
Groton, CT
- Average humidity in April: 74%
The month with the highest relative humidity is June (80%).
The months with the lowest relative humidity are January, March, April and November (74%).
Average rainfall in April
Groton, CT
- Average rainfall in April: 3.11"
The wettest month (with the highest rainfall) is December (3.86").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in April
Groton, CT
- Average rainfall days in April: 14.9 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (9.5 days).
Average snowfall in April
Groton, CT
- Average snowfall in April: 0.08"
The month with the highest snowfall is March (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in April
Groton, CT
- Average snowfall days in April: 0.7 days
The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in April
Groton, CT
- Average sea temperature in April: 44.4°F
The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).
Average daylight in April /
Average sunshine in April
Groton, 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 12min).
- Average sunshine in April: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in April
Groton, CT
- Average sunshine days in April: 13.8 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (12.5 days).
Average UV index in April
Groton, 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
Groton, CT
- Average cloud cover in April: 44
The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in April
Groton, 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).
Groton, Connecticut, USA
Weather forecast for your location
2. Allow the app to use your location