September weather forecastSouth Vienna, OH
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in South Vienna, Ohio, with temperature in the range of an average high of 74.5°F (23.6°C) and an average low of 56.7°F (13.7°C).Temperature
South Vienna's shift from August to September is accompanied by an average high-temperature of a still warm 74.5°F (23.6°C), a slight deviation from 79.3°F (26.3°C). South Vienna observes an average nighttime temperature of 56.7°F (13.7°C) during September.Humidity
In South Vienna, the average relative humidity in September is 78%.Rainfall
The month with the least rainfall in South Vienna is September, when the rain falls for 12.1 days and typically collects 1.34" (34mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day in South Vienna is 12h and 26min.On the first day of September in South Vienna, sunrise is at 7:03 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:17 pm EDT.
Sunshine
The average sunshine in September in South Vienna is 8.2h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Exercise prevention - Warding off sunburn is urged. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
South Vienna, OH
- Average high temperature in September: 74.5°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).
Average pressure in September
South Vienna, OH
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
South Vienna, OH
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in September
South Vienna, OH
- Average humidity in September: 78%
The months with the highest relative humidity are January, February and December (83%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in September
South Vienna, OH
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.34").
Average rainfall days in September
South Vienna, OH
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
South Vienna, OH
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.32").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
South Vienna, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
South Vienna, OH
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
South Vienna, OH
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (9.6 days).
Average UV index in September
South Vienna, OH
- 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
South Vienna, OH
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
South Vienna, OH
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
