Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With September's advent, Donnelsville sees an average high-temperature of a still warm 74.7°F (23.7°C), subtly shifted from August's 79.5°F (26.4°C). September nights are marked by an average temperature drop to a refreshing 56.7°F (13.7°C).Humidity
The average relative humidity in September is 78%.Rainfall
In September, the rain falls for 11 days. Throughout September, 1.02" (26mm) of precipitation is accumulated. In Donnelsville, during the entire year, the rain falls for 138.2 days and collects up to 16.73" (425mm) of precipitation.Snowfall
May through September are months without snowfall in Donnelsville.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 7:04 am and sunset at 8:06 pm. On the last day of September, in Donnelsville, sunrise is at 7:31 am and sunset at 7:19 pm EDT.
Sunshine
In Donnelsville, the average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Undertake precautions - It is suggested to shield oneself from sunburn. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. 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
What is the average September temperature in Donnelsville?
What is the average humidity in September in Donnelsville?
How much does it rain in Donnelsville in September?
When it does not snow in Donnelsville?
Does it snow in Donnelsville in September?
How many hours of daylight does Donnelsville have in September?
When are sunrise and sunset in September in Donnelsville?
How many hours of sunshine does Donnelsville have in September?
What is the UV index intensity in September in Donnelsville?
Average temperature in September
Donnelsville, OH
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (32.7°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°F).
Average pressure in September
Donnelsville, 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 (29.93"Hg).
Average wind speed in September
Donnelsville, OH
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Donnelsville, OH
- Average humidity in September: 78%
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
Donnelsville, OH
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is May (2.2").
The driest months (with the least rainfall) are February and November (0.98").
Average rainfall days in September
Donnelsville, OH
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7 days).
Average snowfall in September
Donnelsville, OH
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Donnelsville, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Donnelsville, OH
- Average daylight in September: 12h and 2min
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 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Donnelsville, OH
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (11.2 days).
Average UV index in September
Donnelsville, 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
Donnelsville, OH
- Average cloud cover in September: 34
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
Donnelsville, 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).
Donnelsville, Ohio, USA
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