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 onset of September entails a subtle temperature shift, as the average high-temperature eases from a hot 90.5°F (32.5°C) in August to a warm 83.8°F (28.8°C). An average low-temperature of 64°F (17.8°C) is expected during September.Heat index
The heat index in September is estimated at a hot 89.6°F (32°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.The heat index's values are generally associated with conditions in shade and light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Humidity
In September, the average relative humidity in Broken Arrow is 70%.Rainfall
In Broken Arrow, in September, during 11.6 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. Throughout the year, there are 131.3 rainfall days, and 29.84" (758mm) of precipitation is accumulated.Snowfall
In Broken Arrow, snow does not fall in April through October.Daylight
In Broken Arrow, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:07 pm CDT.
Sunshine
In Broken Arrow, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 5 in September translates into this advice:
Put precautions into practice - Guidance to elude sunburn is provided. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. 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
Is it hot during 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 Broken Arrow have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Broken Arrow have in September?
What is the UV index intensity in September?
Average temperature in September
Broken Arrow, OK
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (46.4°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in September
Broken Arrow, OK
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Broken Arrow, OK
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is March (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in September
Broken Arrow, OK
- Average humidity in September: 70%
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January, August and October (68%).
Average rainfall in September
Broken Arrow, OK
- Average rainfall in September: 3.23"
The wettest month (with the highest rainfall) is May (5.16").
The driest months (with the least rainfall) are January and February (1.38").
Average rainfall days in September
Broken Arrow, OK
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in September
Broken Arrow, OK
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Broken Arrow, OK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Broken Arrow, OK
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Broken Arrow, OK
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is December (22 days).
The month with the least sunshine days is May (13.4 days).
Average UV index in September
Broken Arrow, OK
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Broken Arrow, OK
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in September
Broken Arrow, 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).
Broken Arrow, Oklahoma, USA
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