In September, Oklahoma City typically sees daytime highs of 30.0°C and overnight lows around 16.5°C. Compared to the annual average high of 22.5°C, September runs +7.5°C.
September in Oklahoma City averages a daytime high of 30.0°C and an overnight low of 16.5°C.
September runs +7.5°C compared to Oklahoma City's annual average high of 22.5°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 30.0°C and cooler evenings around 16.5°C.