September weather forecastOccoquan, VA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Occoquan, Virginia, with an average temperature ranging between max 78.8°F (26°C) and min 61°F (16.1°C).Temperature
A mild drop in Occoquan's average high-temperature is observed in September, transitioning from a tropical 86°F (30°C) in August to a warm 78.8°F (26°C). During September, an average low-temperature of 61°F (16.1°C) is observed in Occoquan.Humidity
In September, the average relative humidity in Occoquan is 75%.Rainfall
In Occoquan, in September, it is raining for 14.4 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, in Occoquan, there are 156.5 rainfall days, and 30.83" (783mm) of precipitation is accumulated.Snowfall
May through November are months without snowfall in Occoquan.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:38 pm. On the last day of September, in Occoquan, Virginia, sunrise is at 7:04 am and sunset at 6:52 pm EDT.
Sunshine
The average sunshine in September in Occoquan is 8.9h.UV index
In Occoquan, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Occoquan, VA
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in September: 61°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in September
Occoquan, VA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Occoquan, VA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Occoquan, VA
- Average humidity in September: 75%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (71%).
Average rainfall in September
Occoquan, VA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is August (3.98").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in September
Occoquan, VA
- Average rainfall days in September: 14.4 days
The months with the highest number of rainy days are May and August (17.8 days).
The month with the least rainy days is November (7.7 days).
Average snowfall in September
Occoquan, VA
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.23").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in September
Occoquan, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.1 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
Occoquan, VA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in September
Occoquan, VA
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is August (10.4 days).
Average UV index in September
Occoquan, VA
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in September
Occoquan, VA
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Occoquan, VA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
