September weather forecast
Oklahoma City, OK

The State Capitol Building, Oklahoma City, Oklahoma, with flags and a statue outside
The State Capitol Building, Oklahoma City, Oklahoma, with flags and a statue outside

Weather in September

September, the first month of the autumn in Oklahoma City, is still a warm month, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 84.6°F (29.2°C).

Temperature

In Oklahoma City, the average high-temperature in September slightly decreases from a tropical 92.8°F (33.8°C) in August to a warm 84.6°F (29.2°C). The average low-temperature, in September, is 65.5°F (18.6°C).

Heat index

The average heat index in September is appraised at a tropical 90°F (32.2°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, metabolic differences, wind), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Oklahoma City, the average relative humidity in September is 65%.

Rainfall

In Oklahoma City, in September, during 13.6 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. Throughout the year, there are 121 rainfall days, and 24.96" (634mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Oklahoma City.

Daylight

In Oklahoma City, Oklahoma, the average length of the day in September is 12h and 23min.
On the first day of September in Oklahoma City, Oklahoma, sunrise is at 7:02 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:15 pm CDT.

Sunshine

In September, the average sunshine is 8.5h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Oklahoma City?

In Oklahoma City, Oklahoma, in September, the average high-temperature is 84.6°F (29.2°C), and the average low-temperature is 65.5°F (18.6°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is appraised at 90°F (32.2°C).

What is the average humidity in September in Oklahoma City?

The average relative humidity in September in Oklahoma City is 65%.

How much does it rain in Oklahoma City in September?

In September, in Oklahoma City, Oklahoma, the rain falls for 13.6 days. Throughout September, 2.83" (72mm) of precipitation is accumulated.

When it does not snow in Oklahoma City?

May through October are months without snowfall.

What is the average length of the day in September in Oklahoma City?

In September, the average day length in Oklahoma City is 12h and 23min.

What time are sunrise and sunset in September in Oklahoma City?

On the first day of September, sunrise is at 7:02 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:15 pm CDT.

How many hours of sunshine does Oklahoma City have in September?

In Oklahoma City, the average sunshine duration in September is 8.5h.

What is the UV index intensity in September in Oklahoma City?

In Oklahoma City, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.

Average temperature in September
Oklahoma City, OK

Average temperature in September - Oklahoma City, OK
  • Average high temperature in September: 84.6°F

The warmest month (with the highest average high temperature) is July (93.6°F).
The month with the lowest average high temperature is January (48.6°F).

  • Average low temperature in September: 65.5°F

The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (31.6°F).

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Average pressure in September
Oklahoma City, OK

Average pressure in September - Oklahoma City, OK
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in September
Oklahoma City, OK

Average wind speed in September - Oklahoma City, OK
  • Average wind speed in September: 8.9mph

The windiest month (with the highest average wind speed) is April (12.3mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).

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Average humidity in September
Oklahoma City, OK

Average humidity in September - Oklahoma City, OK
  • Average humidity in September: 65%

The month with the highest relative humidity is May (73%).
The month with the lowest relative humidity is August (60%).

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Average rainfall in September
Oklahoma City, OK

Average rainfall in September - Oklahoma City, OK
  • Average rainfall in September: 2.83"

The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is December (0.91").

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Average rainfall days in September
Oklahoma City, OK

Average rainfall days in September - Oklahoma City, OK
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is May (14.5 days).
The month with the least rainy days is January (4.5 days).

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Average snowfall in September
Oklahoma City, OK

Average snowfall in September - Oklahoma City, OK
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.26").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Oklahoma City, OK

Average snowfall days in September - Oklahoma City, OK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Oklahoma City, OK

Average daylight in September / Average sunshine in September - Oklahoma City, OK
  • Average daylight in September: 12h and 23min

The month with the longest days is June (Average daylight: 14h and 31min).
The month with the shortest days is December (Average daylight: 9h and 49min).

  • Average sunshine in September: 8.5h

The months with the most sunshine are July and August (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 6h).

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Average sunshine days in September
Oklahoma City, OK

Average sunshine days in September - Oklahoma City, OK
  • Average sunshine days in September: 14.1 days

The month with the most sunshine days is January (24.4 days).
The month with the least sunshine days is May (13.9 days).

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Average UV index in September
Oklahoma City, OK

Average UV index in September - Oklahoma City, OK
  • Average UV index in September: 5

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Oklahoma City, OK

Average cloud cover in September - Oklahoma City, OK
  • Average cloud cover in September: 27

The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 20).

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Average visibility in September
Oklahoma City, OK

Average visibility in September - Oklahoma City, 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).

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