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
September's arrival subtly correlates with a reduction in the average high-temperature, down from a hot 88.2°F (31.2°C) in August to a warm 80.8°F (27.1°C). During the month of September, an average low-temperature of 62.2°F (16.8°C) is recorded.Heat index
September's mean heat index is estimated at 84.2°F (29°C). One might feel worn out with persistent exposure and activity, resulting in heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
The average relative humidity in September in South Coffeyville is 73%.Rainfall
In South Coffeyville, Oklahoma, in September, during 12.3 rainfall days, 2.68" (68mm) of precipitation is typically accumulated. Throughout the year, there are 133.1 rainfall days, and 29.21" (742mm) of precipitation is accumulated.Snowfall
April, June through October are months without snowfall.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:06 pm CDT.
Sunshine
In South Coffeyville, the average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does South Coffeyville have in September?
What is the UV index reading in September?
Average temperature in September
South Coffeyville, OK
- Average high temperature in September: 80.8°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).
Average pressure in September
South Coffeyville, OK
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
South Coffeyville, OK
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is March (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7.2mph).
Average humidity in September
South Coffeyville, OK
- Average humidity in September: 73%
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January and October (69%).
Average rainfall in September
South Coffeyville, OK
- Average rainfall in September: 2.68"
The wettest month (with the highest rainfall) is May (5.28").
The driest month (with the least rainfall) is November (1.06").
Average rainfall days in September
South Coffeyville, OK
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
South Coffeyville, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.69").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in September
South Coffeyville, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
South Coffeyville, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
South Coffeyville, OK
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is January (22.3 days).
The month with the least sunshine days is May (13.5 days).
Average UV index in September
South Coffeyville, OK
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
South Coffeyville, OK
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 24).
Average visibility in September
South Coffeyville, OK
- 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).
South Coffeyville, Oklahoma, USA
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