August weather forecastNew London, CT

August
Weather in August
The sunny charm continues into August, as New London, Connecticut experiences more summer weather. Warm temperatures and calm winds create an atmosphere of tranquility over the city. Average temperatures range from 66.2°F (19°C) to 77.7°F (25.4°C), with no record of snowfall. As August progresses, late-night strolls become more comfortable, creating a soft transition toward the end of summer. The month concludes on a bittersweet note, capturing the final moments of the summer season.Temperature
With the onset of August, the average high-temperature stands at a still moderately hot 77.7°F (25.4°C), closely aligned with July's 78.6°F (25.9°C). Throughout August, New London registers a consistent average low-temperature of 66.2°F (19°C).Humidity
In New London, the average relative humidity in August is 78%.Rainfall
In August, the rain falls for 13.8 days. Throughout August, 2.36" (60mm) of precipitation is accumulated. Throughout the year, there are 159.8 rainfall days, and 33.07" (840mm) of precipitation is accumulated.Snowfall
In New London, snow does not fall in May through October.Ocean temperature
August is the month with the warmest seawater in New London, with an average ocean temperature of 72.1°F (22.3°C).Note: Consideration of an individual's cold resistance, combined with conditions like sunshine, wind, and temperature, suggests that swimming in 72.1°F (22.3°C) water can be delightful. (Olympic swimming is usually in 77°F (25°C) to 82.4°F (28°C) water.)
Daylight
The average length of the day in August in New London is 13h and 47min.On the first day of the month, sunrise is at 5:44 am and sunset at 8:05 pm. On the last day of August, in New London, sunrise is at 6:14 am and sunset at 7:22 pm EDT.
Sunshine
The month with the most sunshine in New London is August, with an average of 10.6h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 6 during August translates into the following directions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
New London, CT
- Average high temperature in August: 77.7°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 August: 66.2°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 August
New London, CT
- Average pressure in August: 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 August
New London, CT
- Average wind speed in August: 7.8mph
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 August
New London, CT
- Average humidity in August: 78%
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 August
New London, CT
- Average rainfall in August: 2.36"
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 August
New London, CT
- Average rainfall days in August: 13.8 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 August
New London, CT
- Average snowfall in August: 0"
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 August
New London, CT
- Average snowfall days in August: 0 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 August
New London, CT
- Average sea temperature in August: 72.1°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 August /
Average sunshine in August
New London, CT
- Average daylight in August: 13h and 48min
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 August: 10h and 36min
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 August
New London, CT
- Average sunshine days in August: 14.6 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 August
New London, CT
- Average UV index in August: 6
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 August
New London, CT
- Average cloud cover in August: 29
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 August
New London, CT
- Average visibility in August: 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).





