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
The start of September marks an average high-temperature of a still moderately hot 74.8°F (23.8°C), hardly distinguishable from the conditions in August. During September, Clayton's temperature averages to a refreshing 56.8°F (13.8°C) at night.Humidity
In Clayton, the average relative humidity in September is 77%.Rainfall
In September, the rain falls for 11.4 days. Throughout September, 0.91" (23mm) of precipitation is accumulated. Throughout the year, there are 133.9 rainfall days, and 14.45" (367mm) of precipitation is accumulated.Snowfall
In Clayton, snow does not fall in May through October.Daylight
The average length of the day in September in Clayton is 12h and 26min.On the first day of September, sunrise is at 7:06 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:20 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In September, the average daily maximum UV index 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: In September, the maximum UV index of 4 suggests these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Clayton in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Clayton have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Clayton, 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
Clayton, 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
Clayton, 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
Clayton, 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
Clayton, 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
Clayton, 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
Clayton, 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
Clayton, 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
Clayton, 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 2min
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
Clayton, 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
Clayton, 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
Clayton, 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
Clayton, 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).
Clayton, Ohio, USA
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