Oklahoma City, Oklahoma weather in September

Averages from 2021–2025 (150 days of record).

Average high: 88°F
Average low: 68°F
Rainy days: ~5 per month
Total precipitation: 2.1 in
Warmest recorded: 103°F
Coldest recorded: 56°F

Expect September days in Oklahoma City, Oklahoma to top out around 88°F and cool to about 68°F overnight, with roughly 5 days of measurable rain across the month. In recent years September has ranged from 56°F to 103°F.

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Current Oklahoma City, Oklahoma forecast → · Historical data by Open-Meteo (ERA5).