September weather forecast
Oologah, OK

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Weather in September

The first month of the autumn, September, is still a warm month in Oologah, Oklahoma, with an average temperature varying between 63.1°F (17.3°C) and 82.2°F (27.9°C).

Temperature

September's arrival signals a moderate reduction in the average high-temperature, easing from a tropical 89.2°F (31.8°C) in August to a moderately hot 82.2°F (27.9°C). In Oologah, September's nights observe an average temperature dip to an enjoyable 63.1°F (17.3°C).

Heat index

Throughout September, the heat index is calculated to be a hot 87.8°F (31°C). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.
Understanding the heat index involves considering values for shaded locales with light wind. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', determines the feeling of heat when you account for the relative humidity. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.

Humidity

The average relative humidity in September is 71%.

Rainfall

In September, the rain falls for 9.7 days. Throughout September, 2.52" (64mm) of precipitation is accumulated. In Oologah, during the entire year, the rain falls for 125.4 days and collects up to 23.19" (589mm) of precipitation.

Snowfall

April through October are months without snowfall in Oologah.

Daylight

In Oologah, the average length of the day in September is 12h and 24min.
On the first day of the month, sunrise is at 6:54 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:07 pm CDT.

Sunshine

In September, the average sunshine is 9h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 5 during September translates into the following directions:
Adopt protective measures - It is advised to guard against sun damage. To avoid the Sun's strongest rays, limit exposure around the mid-day period. 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.
Updated: Jul 11, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The high-temperature during September is 82.2°F (27.9°C) and the low-temperature is 63.1°F (17.3°C). In September, the average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, is calculated to be 87.8°F (31°C).

What is the average humidity in September?

In September, the average relative humidity is 71%.

How much does it rain in September?

In Oologah, in September, during 9.7 rainfall days, 2.52" (64mm) of precipitation is typically accumulated.

When it does not snow?

April through October are months without snowfall.

How many hours of daylight does Oologah have in September?

The average day length in September is 12h and 24min.

When is the sunrise / sunset in September in Oologah?

On the first day of September, sunrise is at 6:54 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:07 pm CDT.

How many hours of sunshine does Oologah have in September?

The average sunshine duration in September is 9h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Oologah, OK

Average temperature in September - Oologah, OK
  • Average high temperature in September: 82.2°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (45°F).

  • Average low temperature in September: 63.1°F

The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).

Average pressure in September
Oologah, OK

Average pressure in September - Oologah, 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 (29.9"Hg).

Average wind speed in September
Oologah, OK

Average wind speed in September - Oologah, OK
  • Average wind speed in September: 7.6mph

The windiest month (with the highest average wind speed) is March (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

Average humidity in September
Oologah, OK

Average humidity in September - Oologah, OK
  • Average humidity in September: 71%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (68%).

Average rainfall in September
Oologah, OK

Average rainfall in September - Oologah, OK
  • Average rainfall in September: 2.52"

The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is November (0.75").

Average rainfall days in September
Oologah, OK

Average rainfall days in September - Oologah, OK
  • Average rainfall days in September: 9.7 days

The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is January (6.2 days).

Average snowfall in September
Oologah, OK

Average snowfall in September - Oologah, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Oologah, OK

Average snowfall days in September - Oologah, OK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Oologah, OK

Average daylight in September / Average sunshine in September - Oologah, 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 42min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

Average sunshine days in September
Oologah, OK

Average sunshine days in September - Oologah, OK
  • Average sunshine days in September: 17.7 days

The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is May (12.9 days).

Average UV index in September
Oologah, OK

Average UV index in September - Oologah, 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
Oologah, OK

Average cloud cover in September - Oologah, 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 23).

Average visibility in September
Oologah, OK

Average visibility in September - Oologah, 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).

Oologah, Oklahoma, USA

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