September in Oklahoma City averages a daily high of 29.8°C with nights around 17.2°C. Expect roughly 6.3 wet days totalling 79.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Oklahoma City is March–May.
Based on OKLAHOMA CITY WILL ROGERS WORLD AIRPORT, OK US (11.6km), 1995–2024. 30 years of September data.