Oklahoma City weather in September: Oklahoma City, Oklahoma: normal highs, lows, rain and records for September
Oklahoma City in September has a normal high of 84°F and a normal low of 62°F, a daily mean of 73°F, falling from 89°F on the 1st to 79°F by the 30th. Measurable precipitation falls on 7 days in a normal September, 3.72 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 16°C, 94 mm of precipitation in September.
- NOAA stationOklahoma City Will Rogers Airport
- Station IDUSW00013967
- Location35.39°N 97.60°W
- Elevation1,285 ft (392 m)
- From the center7 miles
- Population712,919
- Jan 49° 27°
- Feb 54° 31°
- Mar 63° 40°
- Apr 71° 48°
- May 79° 58°
- Jun 88° 66°
- Jul 93° 70°
- Aug 92° 69°
- Sep 84° 62°
- Oct 73° 49°
- Nov 61° 38°
- Dec 50° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Oklahoma City in September?
The normal high is 84°F and the normal low 62°F, for a daily mean of 72.7°F. September is 8.0°F cooler than August and 11.6°F warmer than October. September is the 4th warmest month of the year in Oklahoma City and the 3rd wettest. Across the month the normal high falls 10°F, from 89°F on September 1 to 79°F on September 30. From one year to the next September's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 70°F and 76°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 24%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 89°F | 66°F | 23% | 17% |
| September 8 | 87°F | 64°F | 23% | 17% |
| September 15 | 84°F | 62°F | 24% | 17% |
| September 22 | 82°F | 59°F | 23% | 16% |
| September 30 | 79°F | 56°F | 23% | 15% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 89°F | 66°F | 23% | 17% | 13 h |
| September 2 | 88°F | 66°F | 23% | 17% | 13 h |
| September 3 | 88°F | 66°F | 23% | 17% | 12 h 50 min |
| September 4 | 88°F | 65°F | 23% | 17% | 12 h 50 min |
| September 5 | 87°F | 65°F | 23% | 17% | 12 h 50 min |
| September 6 | 87°F | 65°F | 23% | 17% | 12 h 50 min |
| September 7 | 87°F | 65°F | 23% | 17% | 12 h 40 min |
| September 8 | 87°F | 64°F | 23% | 17% | 12 h 40 min |
| September 9 | 86°F | 64°F | 23% | 17% | 12 h 40 min |
| September 10 | 86°F | 64°F | 24% | 17% | 12 h 40 min |
| September 11 | 86°F | 63°F | 24% | 17% | 12 h 40 min |
| September 12 | 85°F | 63°F | 24% | 17% | 12 h 30 min |
| September 13 | 85°F | 63°F | 24% | 17% | 12 h 30 min |
| September 14 | 85°F | 62°F | 24% | 17% | 12 h 30 min |
| September 15 | 84°F | 62°F | 24% | 17% | 12 h 30 min |
| September 16 | 84°F | 62°F | 24% | 17% | 12 h 30 min |
| September 17 | 84°F | 61°F | 24% | 17% | 12 h 20 min |
| September 18 | 83°F | 61°F | 24% | 17% | 12 h 20 min |
| September 19 | 83°F | 60°F | 24% | 17% | 12 h 20 min |
| September 20 | 82°F | 60°F | 24% | 17% | 12 h 20 min |
| September 21 | 82°F | 60°F | 24% | 17% | 12 h 10 min |
| September 22 | 82°F | 59°F | 23% | 16% | 12 h 10 min |
| September 23 | 81°F | 59°F | 23% | 16% | 12 h 10 min |
| September 24 | 81°F | 59°F | 23% | 16% | 12 h 10 min |
| September 25 | 81°F | 58°F | 23% | 16% | 12 h 10 min |
| September 26 | 80°F | 58°F | 23% | 16% | 12 h |
| September 27 | 80°F | 57°F | 23% | 16% | 12 h |
| September 28 | 80°F | 57°F | 23% | 16% | 12 h |
| September 29 | 79°F | 57°F | 23% | 15% | 12 h |
| September 30 | 79°F | 56°F | 23% | 15% | 11 h 50 min |
- Normal high
- 84°FSeptember average
- Normal low
- 62°FSeptember average
- Precipitation
- 3.72 inmonth total
- Days with precipitation
- 70.01 inch or more
- Days at 90°F or more
- 9
- Daylight
- 13 h to 11 h 50 minSeptember 1 to September 30
- Days at 70°F or more
- 28
- Days at 80°F or more
- 23
- Sunshine
- 84%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00013967; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Oklahoma City in September?
On a given September day the chance of 0.01 inch or more is 23% on average, highest around September 14 (24%). In all, 3.72 in falls on 7 days of a normal September, 1 of them with an inch or more.
In a normal September in Oklahoma City, 9 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00013967.
How humid and windy is Oklahoma City in September?
At 3 p.m. the normal temperature is 78°F with 43% relative humidity and a dew point of 54°F; at 6 a.m. it is 59°F with 82% humidity. The wind averages 10.2 mph, most often from the south-southeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 59°F | 54°F | 82% | 8.4 mph | 53% |
| 9 a.m. | 67°F | 55°F | 67% | 11.6 mph | 46% |
| noon | 75°F | 55°F | 49% | 12.6 mph | 49% |
| 3 p.m. | 78°F | 54°F | 43% | 12.6 mph | 43% |
| 6 p.m. | 73°F | 54°F | 51% | 10.2 mph | 54% |
| 9 p.m. | 66°F | 55°F | 67% | 9.1 mph | 59% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00013967. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Oklahoma City?
The warmest September temperature on Oklahoma City's official record (since 1890) is 108°F, on September 3, 2000; the coldest is 35°F, on September 26, 1912. The wettest September brought 11.85 in (1991).
The September mean against the 1991-2020 normal of 72.7°F: 2021 76.3°F (+3.6), 2022 75.4°F (+2.7), 2023 77.1°F (+4.4), 2024 74.9°F (+2.2), 2025 74.3°F (+1.6), 2026 84.2°F (+11.5). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.3°F | +3.6°F | 0.46 in |
| 2022 | 75.4°F | +2.7°F | 1.80 in |
| 2023 | 77.1°F | +4.4°F | 2.32 in |
| 2024 | 74.9°F | +2.2°F | 2.13 in |
| 2025 | 74.3°F | +1.6°F | 0.60 in |
| 2026 | 84.2°F | +11.5°F | 1.08 in |
Source: records: ACIS, NWS threaded record OKCthr; recent months: ACIS, station USW00013967. Records and recent months use complete months only.
How does September in Oklahoma City compare across Oklahoma?
Across the 134 places PlainClimate covers in Oklahoma, September normal highs run from 82°F in Arnett to 89°F in Grandfield; Oklahoma City's is 84°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Oklahoma City in August92°F by day, 69°F at night
- Oklahoma City in October73°F by day, 49°F at night
- Oklahoma City through the yearEvery month, frost dates, records and recent years
- Oklahoma in SeptemberThe statewide normal and the warmest and coolest places
- Grandfield: Oklahoma's warmest Septembernormal high 89°F