Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Greenwich's shift into August is marked by a subtle change to a still warm 80.6°F (27°C) from July's 82°F (27.8°C) in temperature. In the month of August, the average temperature in Greenwich dips to an agreeable 68.7°F (20.4°C) during the night.Heat index
During August, the heat index is appraised at 84.2°F (29°C). With sustained exposure and activity, exhaustion becomes probable, resulting in heat cramps.Be informed that the heat index values are oriented around shady conditions and gentle breezes. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Humidity
The least humid month is August, with an average relative humidity of 71%.Rainfall
In Greenwich, in August, during 16.8 rainfall days, 3.5" (89mm) of precipitation is typically accumulated. Throughout the year, in Greenwich, there are 165.6 rainfall days, and 37.64" (956mm) of precipitation is accumulated.Snowfall
In Greenwich, snow does not fall in May through October.Ocean temperature
The month with the warmest seawater in Greenwich is August, with an average ocean temperature of 73°F (22.8°C).Note: Individual preferences to cold, influenced by conditions such as sunshine, wind, and surrounding temperature, play a part in the comfort of swimming in 73°F (22.8°C) waters. (As an aside, Olympic swimming standards dictate water temperatures from 77°F (25°C) to 82.4°F (28°C).)
Daylight
In Greenwich, the average length of the day in August is 13h and 46min.On the first day of the month, sunrise is at 5:51 am and sunset at 8:10 pm. On the last day of August, sunrise is at 6:20 am and sunset at 7:28 pm EDT.
Sunshine
In Greenwich, the average sunshine in August is 10.3h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 6 in August translates into this advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Be alert! The reflection of water and sand augments UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are August temperatures in Greenwich?
What is the least humid month in Greenwich?
What is the average humidity in August in Greenwich?
How many days does it rain in August in Greenwich?
When it does not snow in Greenwich?
When is the ocean warmest in Greenwich?
What is the ocean temperature in August in Greenwich?
How many hours of daylight does Greenwich have in August?
When are sunrise and sunset in August in Greenwich?
How many hours of sunshine does Greenwich have in August?
What are the months with the highest UV index in Greenwich?
What is the UV index reading in August in Greenwich?
Average temperature in August
Greenwich, CT
- Average high temperature in August: 80.6°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 August: 68.7°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 August
Greenwich, CT
- Average pressure in August: 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 August
Greenwich, CT
- Average wind speed in August: 6.6mph
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 August
Greenwich, CT
- Average humidity in August: 71%
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 August
Greenwich, CT
- Average rainfall in August: 3.5"
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 August
Greenwich, CT
- Average rainfall days in August: 16.8 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 August
Greenwich, CT
- Average snowfall in August: 0"
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 August
Greenwich, CT
- Average snowfall days in August: 0 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 August
Greenwich, CT
- Average sea temperature in August: 73.1°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 August /
Average sunshine in August
Greenwich, CT
- Average daylight in August: 13h and 5min
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 August: 10h and 2min
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 August
Greenwich, CT
- Average sunshine days in August: 11.8 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 August
Greenwich, 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
Greenwich, CT
- Average cloud cover in August: 31
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 August
Greenwich, 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).
Greenwich, Connecticut, USA
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