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

The first month of the autumn, September, is also a moderately hot month in Oklahoma City, Oklahoma, with an average temperature ranging between max 84.6°F (29.2°C) and min 65.5°F (18.6°C).

Temperature

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

Heat index

The average heat index in September is evaluated at a tropical 89.6°F (32°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like metabolic differences, wind, clothing, and activity influence one's weather impression. 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 important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In September, the average relative humidity is 65%.

Rainfall

In September, the rain falls for 13.6 days. Throughout September, 2.83" (72mm) of precipitation is accumulated. In Oklahoma City, Oklahoma, during the entire year, the rain falls for 121 days and collects up to 24.96" (634mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

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

Sunshine

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

UV index

The average daily maximum UV index in September in Oklahoma City, Oklahoma, is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. 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. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 89.6°F (32°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?

In Oklahoma City, snow does not fall in May through October.

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

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

When are sunrise and sunset in September in Oklahoma City?

In September, on the first day of the month, sunrise is at 7:02 am and sunset at 7:57 pm. On the last day of the month, in Oklahoma City, 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 September, the average sunshine duration is 8.5h.

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

The average daily maximum UV index in September in Oklahoma City is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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: 8h and 30min

The months with the most sunshine are July and August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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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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