September weather forecastUnion, OH
September
Weather in September
September, the first month of the autumn in Union, is still a warm month, with an average temperature varying between 56.8°F (13.8°C) and 74.8°F (23.8°C).Temperature
The initiation of September records an average high-temperature of a still moderately hot 74.8°F (23.8°C), displaying a near consistency with the previous month. Union, during September nights, observes an average temperature of 56.8°F (13.8°C).Humidity
In September, the average relative humidity in Union is 77%.Rainfall
In Union, in September, during 11.4 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Union, during the entire year, the rain falls for 133.9 days and collects up to 14.45" (367mm) of precipitation.Snowfall
May through October are months without snowfall in Union.Daylight
In September, the average length of the day in Union, Ohio, is 12h and 26min.On the first day of the month, sunrise is at 7:05 am and sunset at 8:08 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:20 pm EDT.
Sunshine
In Union, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Heed the precautions - It is counselled to guard against solar damage. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Union, OH
- Average high temperature in September: 74.8°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).
Average pressure in September
Union, OH
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Union, OH
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Union, OH
- Average humidity in September: 77%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in September
Union, OH
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is November (0.83").
Average rainfall days in September
Union, OH
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (6.1 days).
Average snowfall in September
Union, OH
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Union, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Union, 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 18min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Union, OH
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in September
Union, 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
Union, OH
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Union, 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).
