September weather forecastSumerduck, VA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Sumerduck, Virginia, with an average temperature fluctuating between 78.4°F (25.8°C) and 58.6°F (14.8°C).Temperature
The move into September indicates a slight reduction in the average high-temperature, down from August's warm 85.5°F (29.7°C) to a still moderately hot 78.4°F (25.8°C). During September, Sumerduck records a consistent average nighttime temperature of 58.6°F (14.8°C).Humidity
In Sumerduck, the average relative humidity in September is 76%.Rainfall
In Sumerduck, in September, during 12.8 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. In Sumerduck, Virginia, during the entire year, the rain falls for 144.4 days and collects up to 25.08" (637mm) of precipitation.Snowfall
In Sumerduck, snow does not fall in June through October.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:40 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:54 pm EDT.
Sunshine
In September, the average sunshine in Sumerduck is 8.6h.UV index
In September, the average daily maximum UV index in Sumerduck is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: An average UV index of 5 in September transforms into this advice:
Make use of precautions - Suggestions to resist sunburn are communicated. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sumerduck, VA
- Average high temperature in September: 78.4°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (41.4°F).
- Average low temperature in September: 58.6°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 (26.1°F).
Average pressure in September
Sumerduck, 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
Sumerduck, VA
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Sumerduck, VA
- Average humidity in September: 76%
The months with the highest relative humidity are October and December (77%).
The month with the lowest relative humidity is July (72%).
Average rainfall in September
Sumerduck, VA
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.46").
Average rainfall days in September
Sumerduck, VA
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is May (16.1 days).
The months with the least rainy days are January and November (8.3 days).
Average snowfall in September
Sumerduck, VA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.36").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Sumerduck, VA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (4.8 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
Sumerduck, 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 36min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Sumerduck, VA
- Average sunshine days in September: 15 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (12.5 days).
Average UV index in September
Sumerduck, 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, February, November and December (UV index 2).
Average cloud cover in September
Sumerduck, VA
- Average cloud cover in September: 39
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
Sumerduck, VA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
