September weather forecastHarris, RI
September
Weather in September
September, the first month of the autumn in Harris, is also an agreeable month, with an average temperature fluctuating between 72.9°F (22.7°C) and 57.7°F (14.3°C).Temperature
September's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's warm 79.7°F (26.5°C) to a pleasant 72.9°F (22.7°C). In September, Harris reports a consistent average low-temperature of 57.7°F (14.3°C) during the nights.Humidity
The average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 10.4 days and accumulates 0.94" (24mm) of precipitation.Snowfall
In Harris, snow does not fall in June 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 6:12 am and sunset at 7:19 pm. On the last day of September, sunrise is at 6:42 am and sunset at 6:29 pm EDT.
Sunshine
In Harris, the average sunshine in September is 8.5h.UV index
In Harris, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Harris, RI
- Average high temperature in September: 72.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).
Average pressure in September
Harris, RI
- Average pressure in September: 30.06"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
Harris, RI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in September
Harris, RI
- Average humidity in September: 77%
The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Harris, RI
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is April (2.17").
The driest month (with the least rainfall) is September (0.94").
Average rainfall days in September
Harris, RI
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Harris, RI
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.89").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Harris, RI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Harris, RI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Harris, RI
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (12.9 days).
Average UV index in September
Harris, 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, November and December (UV index 2).
Average cloud cover in September
Harris, RI
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Harris, 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).
