August weather forecastJamestown, RI
August
Weather in August
August in Jamestown, Rhode Island, retains the atmosphere of a high-summer month, despite being a herald of the coming fall season. The long-lasting daylight continues, giving ample time for outdoor activities under the warm summer sun. The month maintains a striking balance between the high-temperature days and cooling-off during twilight hours. The most apparent change in weather patterns is the slight decline in sea temperatures, moving gently from 67.4°F (19.7°C) to 69.6°F (20.9°C). August is a palate of sun-bleached colors and late-summer energy, resonating with visitors and locals seeking the charm of a classic New England summer before it begins to wane.Temperature
August's weather in Jamestown records an average high-temperature of a still moderately hot 77.7°F (25.4°C), showing little deviation from July. Jamestown, during the month of August, experiences an average low-temperature of 65.7°F (18.7°C).Humidity
In Jamestown, the average relative humidity in August is 78%.Rainfall
In Jamestown, in August, it is raining for 11.8 days, with typically 2.09" (53mm) of accumulated precipitation. In Jamestown, Rhode Island, during the entire year, the rain falls for 148.1 days and collects up to 29.65" (753mm) of precipitation.Snowfall
April, June through October are months without snowfall.Ocean temperature
With an average ocean temperature of 69.6°F (20.9°C), August is the month with the warmest seawater in Jamestown.Note: For most individuals, swimming in 69.6°F (20.9°C) is not a pleasant experience. The difficulty in managing breathing increases as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
The average length of the day in August in Jamestown, Rhode Island, is 13h and 47min.On the first day of the month, sunrise is at 5:41 am and sunset at 8:02 pm. On the last day of August, sunrise is at 6:11 am and sunset at 7:19 pm EDT.
Sunshine
The month with the most sunshine in Jamestown is August, with an average of 10.5h of sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Jamestown. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 6 in August transforms into this advice:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Jamestown, RI
- Average high temperature in August: 77.7°F
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in August: 65.7°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 (26.4°F).
Average pressure in August
Jamestown, RI
- Average pressure in August: 29.98"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in August
Jamestown, RI
- Average wind speed in August: 8.1mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity in August
Jamestown, RI
- Average humidity in August: 78%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is March (73%).
Average rainfall in August
Jamestown, RI
- Average rainfall in August: 2.09"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in August
Jamestown, RI
- Average rainfall days in August: 11.8 days
The month with the highest number of rainy days is April (15.6 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in August
Jamestown, RI
- Average snowfall in August: 0"
The month with the highest snowfall is February (2.76").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in August
Jamestown, RI
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in August
Jamestown, RI
- Average sea temperature in August: 69.6°F
The best month for swimming (with the highest average sea temperature) is August (69.6°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight in August /
Average sunshine in August
Jamestown, RI
- 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 30min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in August
Jamestown, RI
- Average sunshine days in August: 16.9 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is April (12.3 days).
Average UV index in August
Jamestown, RI
- 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 and December (UV index 2).
Average cloud cover in August
Jamestown, RI
- Average cloud cover in August: 29
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in August
Jamestown, RI
- 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).
