Climate averages 1991–2020
Broken Arrow weather
in September.
A hot, wet month: the 4th warmest and the 9th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Broken Arrow: daytime highs average 28.1°C and nights cool to about 19.0°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 101 mm of rain on roughly 8 days, which makes September a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 27 min on an average September day.
The nearest other city in this atlas is Tulsa (21 km away). In September its highs average 28.3°C, about as warm as Broken Arrow, with 101 mm of rain.
Among the 498 cities listed in the United States, Broken Arrow ranks joint 201st of 498 for the warmest September highs and joint 398th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Broken Arrow is 1.2°C warmer than that mean.
From September to October, average highs fall by 6.3°C to 21.9°C, and monthly rainfall falls from 101 mm to 96 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Broken Arrow climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.2°C-0.7°C | -0.7°C | 53 | 6.3 | 10.010 h |
| February | 11.1°C1.3°C | 1.3°C | 56 | 6.6 | 10.811 h |
| March | 16.1°C6.0°C | 6.0°C | 96 | 9.8 | 11.912 h |
| April | 21.0°C10.9°C | 10.9°C | 127 | 10.5 | 13.113 h |
| May | 25.4°C16.4°C | 16.4°C | 150 | 12.3 | 14.114 h |
| June | 30.2°C21.4°C | 21.4°C | 113 | 9.7 | 14.615 h |
| July | 32.9°C23.9°C | 23.9°C | 79 | 7.6 | 14.414 h |
| August | 32.6°C23.3°C | 23.3°C | 71 | 6.9 | 13.514 h |
| September, selected | 28.1°C19.0°C | 19.0°C | 101 | 7.6 | 12.412 h |
| October | 21.9°C12.7°C | 12.7°C | 96 | 8.1 | 11.311 h |
| November | 15.0°C6.3°C | 6.3°C | 70 | 7.1 | 10.310 h |
| December | 9.4°C1.0°C | 1.0°C | 64 | 6.5 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Tulsa in SeptemberUnited States · 21 kmHigh 28.3°C · Low 19.1°C · 101 mm rain
- Fort Smith in SeptemberUnited States · 146 kmHigh 28.9°C · Low 18.6°C · 93 mm rain
- Fayetteville, United States in SeptemberUnited States · 147 kmHigh 26.7°C · Low 17.2°C · 97 mm rain
- Springdale in SeptemberUnited States · 150 kmHigh 26.7°C · Low 17.3°C · 97 mm rain
- Edmond in SeptemberUnited States · 158 kmHigh 28.6°C · Low 18.9°C · 70 mm rain
- Oklahoma City in SeptemberUnited States · 169 kmHigh 28.5°C · Low 18.9°C · 73 mm rain
- Norman in SeptemberUnited States · 175 kmHigh 28.6°C · Low 19.4°C · 73 mm rain
- Wichita in SeptemberUnited States · 228 kmHigh 27.2°C · Low 17.3°C · 80 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Broken Arrow) is explained once on the Broken Arrow year overview and on the Sources, method and limits page.