September in Norman averages a daily high of 29.5°C with nights around 17°C. Expect roughly 6.9 wet days totalling 79.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Norman is March–May.
Based on NORMAN 3 SSE, OK US (4.6km), 1995–2024. 23 years of September data.