Oklahoma weather in September
September is one of the best months to visit Oklahoma: highs of 29°C (85°F) and about 77 mm (3.0 in) of rain on average. Nights average 17°C (63°F) and cloud cover 38% (NASA POWER, 2001–2025 averages). It is the 6th driest month of the year and the 4th warmest. Compared with August, it is cooler and drier; October brings highs of 23°C (73°F) and 81 mm (3.2 in) of rain.
Figures are long-term averages for Oklahoma City, the largest city in Oklahoma. See below for other places.
Is September a good time to visit Oklahoma?
best month Weather score 80/100.
Yes. September is one of the best months for weather in Oklahoma.
Does it rain a lot in Oklahoma in September?
Some rain is normal: about 77 mm (3.0 in) falls in an average September. It is the 6th driest month of the year.
How warm is Oklahoma in September?
Days average 29°C (85°F) and nights 17°C (63°F).
Oklahoma weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 9°C (47°F) | -3°C (27°F) | 32 mm | 48% | least pleasant |
| February | 11°C (51°F) | -1°C (29°F) | 39 mm | 56% | least pleasant |
| March | 17°C (63°F) | 4°C (40°F) | 62 mm | 55% | fair |
| April | 23°C (73°F) | 9°C (49°F) | 89 mm | 52% | best |
| May | 27°C (81°F) | 15°C (59°F) | 129 mm | 55% | fair |
| June | 32°C (89°F) | 20°C (69°F) | 113 mm | 44% | fair |
| July | 35°C (94°F) | 23°C (73°F) | 85 mm | 39% | fair |
| August | 34°C (93°F) | 22°C (72°F) | 94 mm | 40% | fair |
| September | 29°C (85°F) | 17°C (63°F) | 77 mm | 38% | best |
| October | 23°C (73°F) | 10°C (50°F) | 81 mm | 40% | best |
| November | 16°C (61°F) | 4°C (38°F) | 39 mm | 43% | best |
| December | 9°C (49°F) | -2°C (29°F) | 38 mm | 51% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Oklahoma in September
Weather can differ a lot within Oklahoma: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Oklahoma City | 29°C (85°F) | 17°C (63°F) | 77 mm | best |
| Tulsa | 30°C (85°F) | 17°C (63°F) | 86 mm | best |
| Norman | 30°C (86°F) | 18°C (64°F) | 83 mm | best |
| Broken Arrow | 29°C (85°F) | 17°C (63°F) | 93 mm | best |
| Lawton | 30°C (87°F) | 18°C (65°F) | 80 mm | best |
| Edmond | 29°C (85°F) | 17°C (63°F) | 77 mm | best |
| Moore | 29°C (85°F) | 17°C (63°F) | 77 mm | best |
| Midwest City | 29°C (85°F) | 17°C (63°F) | 77 mm | best |
| Enid | 30°C (85°F) | 17°C (62°F) | 63 mm | best |
| Stillwater | 30°C (86°F) | 17°C (63°F) | 81 mm | best |
| Muskogee | 30°C (85°F) | 18°C (64°F) | 97 mm | best |
| Bartlesville | 29°C (85°F) | 17°C (62°F) | 81 mm | best |