September weather forecastHolston Mill, VA
September
Weather in September
September, the first month of the autumn in Holston Mill, is also a moderately hot month, with an average temperature varying between 52.2°F (11.2°C) and 74.5°F (23.6°C).Temperature
The arrival of September brings an average high-temperature of a still moderately hot 74.5°F (23.6°C), subtly diverging from August's 79.5°F (26.4°C). September in Holston Mill presents a pronounced difference from daytime highs, with a consistent average low-temperature of 52.2°F (11.2°C).Humidity
In September, the average relative humidity in Holston Mill is 80%.Rainfall
The month with the least rainfall is September, when the rain falls for 16.9 days and typically collects 1.77" (45mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Holston Mill is 12h and 24min.On the first day of the month, sunrise is at 6:58 am and sunset at 7:54 pm. On the last day of September, in Holston Mill, sunrise is at 7:21 am and sunset at 7:10 pm EDT.
Sunshine
The average sunshine in September in Holston Mill is 8.2h.UV index
In Holston Mill, Virginia, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Holston Mill, VA
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (57.9°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).
Average pressure in September
Holston Mill, 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 (29.99"Hg).
Average wind speed in September
Holston Mill, VA
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are January and February (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Holston Mill, VA
- Average humidity in September: 80%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is November (77%).
Average rainfall in September
Holston Mill, VA
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Holston Mill, VA
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is July (22 days).
The month with the least rainy days is November (10.8 days).
Average snowfall in September
Holston Mill, VA
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Holston Mill, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Holston Mill, VA
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
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: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Holston Mill, VA
- Average sunshine days in September: 10.2 days
The month with the most sunshine days is November (15.6 days).
The month with the least sunshine days is May (6.7 days).
Average UV index in September
Holston Mill, VA
- Average UV index in September: 4
The month with the highest UV index is 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
Holston Mill, VA
- Average cloud cover in September: 43
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are June, July and August (Cloud cover 40).
Average visibility in September
Holston Mill, 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).
