September weather forecastShelter Harbor, RI
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Shelter Harbor, Rhode Island, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 60.4°F (15.8°C).Temperature
September signifies a gentle decline in Shelter Harbor's average high-temperature, easing from a warm 77.5°F (25.3°C) in August to an agreeable 71.2°F (21.8°C). Shelter Harbor's temperature drops to an average low of 60.4°F (15.8°C) during the nights of September.Humidity
In September, the average relative humidity is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 13 days and accumulates 1.81" (46mm) of precipitation.Snowfall
In Shelter Harbor, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:19 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:29 pm EDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: An average UV index of 4 in September transforms into this advice:
Ensure safety - Recommendations to avert sunburn are presented. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Shelter Harbor, RI
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (36.7°F).
- Average low temperature in September: 60.4°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in September
Shelter Harbor, RI
- Average pressure in September: 30.06"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 September
Shelter Harbor, RI
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).
Average humidity in September
Shelter Harbor, RI
- Average humidity in September: 78%
The months with the highest relative humidity are June and July (81%).
The months with the lowest relative humidity are March and November (74%).
Average rainfall in September
Shelter Harbor, RI
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in September
Shelter Harbor, RI
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in September
Shelter Harbor, RI
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Shelter Harbor, RI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Shelter Harbor, 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 54min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Shelter Harbor, RI
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is July (11 days).
Average UV index in September
Shelter Harbor, 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
Shelter Harbor, RI
- Average cloud cover in September: 32
The months with the most cloud cover are March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Shelter Harbor, 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).
