Climate averages 1991–2020
Bryan weather
in September.
A hot, moderately wet month: the 4th warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Bryan: daytime highs average 31.4°C and nights cool to about 21.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 76 mm of rain on roughly 8 days, which makes September a moderately wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 23 min on an average September day.
The nearest other city in this atlas is College Station (6 km away). In September its highs average 31.4°C, about as warm as Bryan, with 76 mm of rain.
Among the 498 cities listed in the United States, Bryan ranks joint 42nd of 498 for the warmest September highs and joint 255th of 498 for the driest September (rainfall, lowest first). The mean September high of those 498 cities is 26.9°C; Bryan is 4.5°C warmer than that mean.
From September to October, average highs fall by 4.9°C to 26.5°C, and monthly rainfall rises from 76 mm to 102 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
Bryan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 15.4°C5.7°C | 5.7°C | 87 | 8.3 | 10.410 h |
| February | 17.5°C7.6°C | 7.6°C | 77 | 8.9 | 11.111 h |
| March | 21.1°C11.0°C | 11.0°C | 90 | 9.0 | 12.012 h |
| April | 25.1°C14.7°C | 14.7°C | 101 | 8.5 | 12.913 h |
| May | 29.0°C19.3°C | 19.3°C | 106 | 10.0 | 13.714 h |
| June | 32.1°C22.9°C | 22.9°C | 85 | 9.9 | 14.114 h |
| July | 34.2°C24.4°C | 24.4°C | 48 | 7.0 | 13.914 h |
| August | 34.7°C24.7°C | 24.7°C | 63 | 7.1 | 13.313 h |
| September, selected | 31.4°C21.8°C | 21.8°C | 76 | 7.5 | 12.412 h |
| October | 26.5°C16.4°C | 16.4°C | 102 | 7.7 | 11.411 h |
| November | 20.4°C10.7°C | 10.7°C | 85 | 7.9 | 10.611 h |
| December | 16.3°C6.9°C | 6.9°C | 95 | 8.7 | 10.210 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
- College Station in SeptemberUnited States · 6 kmHigh 31.4°C · Low 21.8°C · 76 mm rain
- Cypress in SeptemberUnited States · 102 kmHigh 31.1°C · Low 22.0°C · 97 mm rain
- The Woodlands in SeptemberUnited States · 102 kmHigh 31.1°C · Low 21.8°C · 100 mm rain
- Temple in SeptemberUnited States · 104 kmHigh 31.0°C · Low 21.4°C · 69 mm rain
- Waco in SeptemberUnited States · 122 kmHigh 31.4°C · Low 21.7°C · 60 mm rain
- Round Rock in SeptemberUnited States · 127 kmHigh 31.1°C · Low 21.5°C · 74 mm rain
- Sugar Land in SeptemberUnited States · 137 kmHigh 30.8°C · Low 22.3°C · 108 mm rain
- Killeen in SeptemberUnited States · 139 kmHigh 30.8°C · Low 21.3°C · 69 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 Bryan) is explained once on the Bryan year overview and on the Sources, method and limits page.
College Station lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.