Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In Harrisville, the average high-temperature in September gently drops from a warm 80.1°F (26.7°C) in August to an agreeable 72.7°F (22.6°C). During September, Harrisville observes a consistent average nighttime temperature of 54.9°F (12.7°C).Humidity
February, September and October, with an average relative humidity of 79%, are the most humid months.Rainfall
The month with the least rainfall is September, when the rain falls for 10.9 days and typically collects 1.14" (29mm) of precipitation.Snowfall
In Harrisville, snow does not fall in June through September.Daylight
In Harrisville, Rhode Island, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:13 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:29 pm EDT.
Sunshine
In Harrisville, the average sunshine in September is 8.1h.UV index
In Harrisville, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What are the most humid months in Harrisville?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Harrisville have in September?
What is the UV index intensity in September?
Average temperature in September
Harrisville, RI
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in September
Harrisville, 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
Harrisville, RI
- Average wind speed in September: 6.4mph
The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
Harrisville, RI
- Average humidity in September: 79%
The months with the highest relative humidity are February, September and October (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Harrisville, RI
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is April (2.4").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in September
Harrisville, RI
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is June (15.5 days).
The month with the least rainy days is February (7 days).
Average snowfall in September
Harrisville, RI
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.19").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Harrisville, RI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Harrisville, RI
- Average daylight in September: 12h and 3min
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 1min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in September
Harrisville, RI
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (13 days).
Average UV index in September
Harrisville, 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
Harrisville, RI
- Average cloud cover in September: 41
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Harrisville, RI
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
Harrisville, Rhode Island, USA
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