December in Oklahoma City averages a daily high of 11°C with nights around -0.8°C. Expect roughly 5.3 wet days totalling 40.1mm. Generally workable, with some weather to plan around.
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 December data.