September weather forecastBlacksburg, VA
September
Weather in September
September brings the onset of autumn, reflecting in Blacksburg's weather through a noticeable drop in average temperatures from the summer peak. As the daylight hours shorten to an average of 12.4 hours a day, less sunshine graces the city, contrasting the long days of summer. Interestingly, rainfall significantly decreases in this period, with an average of 1.65" (42mm), the lowest throughout the year. The cooler weather is accompanied by the city's natural environment adopting rich, fall colors. As September proceeds, the city steers toward the silence and tranquility of the impending winter season.Temperature
Blacksburg in September experiences a gentle temperature dip, with average high-temperatures reducing from a moderately hot 81.7°F (27.6°C) in August to a still warm 75.6°F (24.2°C). Blacksburg in September anticipates an average nighttime temperature of 54.3°F (12.4°C).Humidity
In September, the average relative humidity is 79%.Rainfall
September is the month with the least rainfall in Blacksburg. Rain falls for 13.5 days and accumulates 1.65" (42mm) of precipitation.Snowfall
June through September are months without snowfall in Blacksburg.Daylight
In Blacksburg, the average length of the day in September is 12h and 25min.On the first day of September in Blacksburg, sunrise is at 6:52 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:05 pm EDT.
Sunshine
In Blacksburg, the average sunshine in September is 8.2h.UV index
In Blacksburg, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 4 suggests these recommendations:
Ensure safety - Sun damage prevention is strongly urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blacksburg, VA
- Average high temperature in September: 75.6°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (39.4°F).
- Average low temperature in September: 54.3°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Blacksburg, VA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Blacksburg, VA
- Average wind speed in September: 4.5mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Blacksburg, VA
- Average humidity in September: 79%
The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is July (75%).
Average rainfall in September
Blacksburg, VA
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in September
Blacksburg, VA
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (20.3 days).
The month with the least rainy days is November (9.8 days).
Average snowfall in September
Blacksburg, VA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Blacksburg, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Blacksburg, VA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Blacksburg, VA
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is May (8.6 days).
Average UV index in September
Blacksburg, VA
- 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, November and December (UV index 2).
Average cloud cover in September
Blacksburg, VA
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 35).
Average visibility in September
Blacksburg, VA
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (5mi).
The month with the lowest visibility is September (4mi).
