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 in Groton brings a rise in the average high-temperature, moving from a chilly 43.3°F (6.3°C) in March to a cool 53.4°F (11.9°C). In the month of April, Groton's average low-temperature falls to a cold 42.4°F (5.8°C).Humidity
January, March, April and November, with an average relative humidity of 74%, are the least humid months in Groton.Rainfall
In Groton, Connecticut, in April, during 14.9 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. Throughout the year, there are 159.8 rainfall days, and 33.07" (840mm) of precipitation is accumulated.Snowfall
Months with snowfall in Groton, Connecticut, are January through April, November and December. April is the last month it regularly snows in Groton. During 0.7 snowfall days, in April, Groton aggregates 0.08" (2mm) of snow. In Groton, Connecticut, during the entire year, snow falls for 24 days and aggregates up to 7.68" (195mm) of snow.Ocean temperature
In April, the average ocean temperature in Groton is 44.4°F (6.9°C).Note: To swim in 44.4°F (6.9°C) at less than 50°F (10°C), ensure you're well-protected. Without it, be prepared for a sudden jolt of cold and breathing issues. Remember, even 55.4°F (13°C) is not welcoming.
Daylight
In Groton, the average length of the day in April 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
In April, the average sunshine in Groton is 8.4h.UV index
In Groton, Connecticut, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 3 during April morphs into the following directions:
Take necessary precautions - Defending against sun damage is advocated. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Frequently asked questions
What is the temperature in April in Groton?
What are the least humid months in Groton?
What is the average humidity in April in Groton?
How much does it rain in Groton in April?
What is the last month it snows in Groton?
What is the ocean temperature in April in Groton?
What is the average length of the day in April in Groton?
What time are sunrise and sunset in April in Groton?
How many hours of sunshine does Groton have in April?
What is the UV index intensity in April in Groton?
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
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