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 sees a slight reduction in average high-temperature, with a shift from a tropical 88.2°F (31.2°C) in August to a moderately hot 80.4°F (26.9°C). In Quapaw, the average nighttime temperature during September is an enjoyable 61.5°F (16.4°C).Humidity
The average relative humidity in September is 74%.Rainfall
In Quapaw, in September, during 12.4 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. Throughout the year, there are 139.2 rainfall days, and 30" (762mm) of precipitation is accumulated.Snowfall
April, June through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 24min.On the first day of the month, sunrise is at 6:50 am and sunset at 7:47 pm. On the last day of September, in Quapaw, sunrise is at 7:14 am and sunset at 7:03 pm CDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
In Quapaw, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Act with care - The need to guard against sun damage is communicated. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Quapaw have in September?
When is the sunrise / sunset in September in Quapaw?
How many hours of sunshine does Quapaw have in September?
How high is the UV index in September?
Average temperature in September
Quapaw, OK
- Average high temperature in September: 80.4°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (43.2°F).
- Average low temperature in September: 61.5°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in September
Quapaw, OK
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Quapaw, OK
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Quapaw, OK
- Average humidity in September: 74%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Quapaw, OK
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is May (5.04").
The driest month (with the least rainfall) is November (1.42").
Average rainfall days in September
Quapaw, OK
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in September
Quapaw, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in September
Quapaw, 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, September and October (0 days).
Average daylight in September /
Average sunshine in September
Quapaw, 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: 9h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Quapaw, OK
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in September
Quapaw, 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, February and December (UV index 2).
Average cloud cover in September
Quapaw, OK
- Average cloud cover in September: 28
The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Quapaw, 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).
Quapaw, Oklahoma, USA
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