Climate averages 1991–2020
Ciudad Río Bravo weather
in September.
A hot, wet month: the 5th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Ciudad Río Bravo: daytime highs average 32.4°C and nights cool to about 23.9°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 94 mm of rain on roughly 13 days, which makes September a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 20 min on an average September day.
The nearest other city in this atlas is Reynosa (22 km away). In September its highs average 32.7°C, about as warm as Ciudad Río Bravo, with 89 mm of rain.
Among the 153 cities listed in Mexico, Ciudad Río Bravo ranks 16th of 153 for the warmest September highs and 28th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Ciudad Río Bravo is 5.8°C warmer than that mean.
From September to October, average highs fall by 2.5°C to 29.9°C, and monthly rainfall falls from 94 mm to 62 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
Ciudad Río Bravo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.9°C12.4°C | 12.4°C | 28 | 5.1 | 10.711 h |
| February | 24.4°C14.4°C | 14.4°C | 24 | 4.6 | 11.311 h |
| March | 27.1°C17.1°C | 17.1°C | 36 | 5.7 | 12.012 h |
| April | 30.2°C20.1°C | 20.1°C | 43 | 5.6 | 12.813 h |
| May | 32.7°C23.2°C | 23.2°C | 47 | 6.7 | 13.413 h |
| June | 34.6°C25.2°C | 25.2°C | 55 | 7.7 | 13.714 h |
| July | 35.2°C25.5°C | 25.5°C | 58 | 6.8 | 13.614 h |
| August | 35.5°C25.7°C | 25.7°C | 44 | 7.9 | 13.113 h |
| September, selected | 32.4°C23.9°C | 23.9°C | 94 | 12.9 | 12.312 h |
| October | 29.9°C20.7°C | 20.7°C | 62 | 7.5 | 11.612 h |
| November | 25.7°C16.5°C | 16.5°C | 37 | 5.9 | 10.911 h |
| December | 22.6°C13.4°C | 13.4°C | 31 | 5.2 | 10.511 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
- Reynosa in SeptemberMexico · 22 kmHigh 32.7°C · Low 23.9°C · 89 mm rain
- McAllen in SeptemberUnited States · 28 kmHigh 32.5°C · Low 23.8°C · 88 mm rain
- Mission in SeptemberUnited States · 35 kmHigh 32.7°C · Low 23.8°C · 88 mm rain
- Edinburg in SeptemberUnited States · 36 kmHigh 32.6°C · Low 23.8°C · 88 mm rain
- Heroica Matamoros in SeptemberMexico · 60 kmHigh 30.6°C · Low 24.5°C · 108 mm rain
- Linares in SeptemberMexico · 194 kmHigh 30.0°C · Low 20.5°C · 167 mm rain
- Ciudad Benito Juárez in SeptemberMexico · 204 kmHigh 29.2°C · Low 20.6°C · 120 mm rain
- Ciudad Apodaca in SeptemberMexico · 211 kmHigh 29.6°C · Low 20.8°C · 117 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 Ciudad Río Bravo) is explained once on the Ciudad Río Bravo year overview and on the Sources, method and limits page.