September weather forecastNewport, RI
September
Weather in September
September ushers in autumn in Newport, leading to a noticeable reduction in temperature. While the summer heat fades away, it remains warm enough for outdoor activities such as hiking or beach visits. As per September data, rainfall is at its lowest, averaging only 1.42" (36mm) throughout the month. Meanwhile, the length of daylight hours begins to shrink, signaling the approach of winter.Temperature
September signifies a minor drop in average high-temperature, transitioning from a moderately hot 77.7°F (25.4°C) in August to an agreeable 71.4°F (21.9°C). Newport, during the month of September, experiences an average low-temperature of 59.7°F (15.4°C).Humidity
In Newport, the average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall in Newport. Rain falls for 11.6 days and accumulates 1.42" (36mm) of precipitation.Snowfall
In Newport, snow does not fall in April, June through October.Ocean temperature
In September, the average ocean temperature in Newport is 67.3°F (19.6°C).Note: Most people do not take pleasure in swimming in water at 67.3°F (19.6°C). The difficulty of managing breathing increases as the water temperature dips from 69.8°F (21°C) to 59°F (15°C).
Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:12 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:28 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Newport, RI
- Average high temperature in September: 71.4°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 September: 59.7°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 September
Newport, RI
- Average pressure in September: 30.05"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 September
Newport, RI
- Average wind speed in September: 9mph
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 September
Newport, RI
- Average humidity in September: 78%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is March (73%).
Average rainfall in September
Newport, RI
- Average rainfall in September: 1.42"
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 September
Newport, RI
- Average rainfall days in September: 11.6 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 September
Newport, RI
- Average snowfall in September: 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 September
Newport, RI
- Average snowfall days in September: 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 September
Newport, RI
- Average sea temperature in September: 67.2°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 September /
Average sunshine in September
Newport, RI
- Average daylight in September: 12h and 30min
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 September: 8h and 42min
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 September
Newport, RI
- Average sunshine days in September: 15.8 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 September
Newport, RI
- Average UV index in September: 4
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 September
Newport, RI
- Average cloud cover in September: 33
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 September
Newport, RI
- Average visibility in September: 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).
