September weather forecast and climate
Oklahoma City, OK

The State Capitol Building in Oklahoma City in Oklahoma, USA, with flags and a statue outside
The State Capitol Building in Oklahoma City in Oklahoma, USA, with flags and a statue outside
September has relatively moderate heat and humidity. Oklahoma experiences a decrease in the mean temperature. The temperature stands at a warm 84°F (28.9°C) during the day and a comfortable 63°F (17.2°C) during the night.
The cold weather is approaching. The individuals planning to visit Oklahoma City are advised to bring clothes that will keep them warm through the cold season. The hours of day and night balance at 12 hours each.
For lovers of balloon rides, this is the ideal period as the number of balloon festivals during September makes worthwhile the visit to Oklahoma City.
Average temperature in September - Oklahoma City, OK
  • Average high temperature in September: 29.3°C

The warmest month (with the highest average high temperature) is July (34.4°C).
The month with the lowest average high temperature is January (9.8°C).

  • Average low temperature in September: 17.3°C

The month with the highest average low temperature is July (22.3°C).
The coldest month (with the lowest average low temperature) is January (-1.8°C).

Average humidity in September - Oklahoma City, OK
  • Average humidity in September: 67.1%

The month with the highest relative humidity is December (67.8%).
The month with the lowest relative humidity is July (60.9%).

Average rainfall in September - Oklahoma City, OK
  • Average rainfall in September: 103.1mm

The wettest month (with the highest rainfall) is June (125.2mm).
The driest month (with the lowest rainfall) is January (35.3mm).

Average rainfall days in September - Oklahoma City, OK
  • Average rainfall days in September: 7.2 days

The month with the highest number of rainy days is May (9.8 days).
The month with the lowest number of rainy days is January (5.1 days).

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

The month with the highest snowfall is January (71.1mm).
Months with the lowest snowfall are April, May, June, July, August, September and October (0mm).

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 December (1.7 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Oklahoma City, OK
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 8.8h

The month with most sunshine is July (Average sunshine: 11.5h).
The month with least sunshine is December (Average sunshine: 5.8h).

Average UV index in September - Oklahoma City, OK
  • Average UV index in September: 8

Months with the highest UV index are June and July (UV index 10).
The month with the lowest UV index is December (UV index 2).

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