Oklahoma City
Oklahoma, USA
Long-term weather forecast
Long-term weather forecast

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.
  • The 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).

  • The 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).

  • The 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%).

  • The 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).

  • The 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).

  • The 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).

  • The 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).

  • The average daylight in September: 12h

The month with the longest days is June (Average daylight: 15h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • The 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).

  • The 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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