Climate averages 1991–2020
Ciudad Acuña weather
in September.
A hot, moderately wet month: the joint 4th 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 Acuña: daytime highs average 32.3°C and nights cool to about 22.8°C. By daytime temperature it is the joint 4th warmest of the 12 months.
Expect about 65 mm of rain on roughly 8 days, which makes September a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 22 min on an average September day.
The nearest other city in this atlas is Piedras Negras (81 km away). In September its highs average 32.8°C, about as warm as Ciudad Acuña, with 79 mm of rain.
Among the 153 cities listed in Mexico, Ciudad Acuña ranks 17th of 153 for the warmest September highs and 17th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Ciudad Acuña is 5.7°C warmer than that mean.
From September to October, average highs fall by 4.2°C to 28.1°C, and monthly rainfall falls from 65 mm to 55 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 Acuña climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.2°C7.1°C | 7.1°C | 22 | 3.5 | 10.510 h |
| February | 21.2°C9.3°C | 9.3°C | 23 | 4.1 | 11.111 h |
| March | 24.9°C13.0°C | 13.0°C | 38 | 5.2 | 12.012 h |
| April | 29.1°C17.0°C | 17.0°C | 42 | 5.0 | 12.913 h |
| May | 32.3°C21.3°C | 21.3°C | 64 | 7.6 | 13.614 h |
| June | 35.2°C24.7°C | 24.7°C | 38 | 6.0 | 14.014 h |
| July | 35.8°C25.6°C | 25.6°C | 41 | 5.4 | 13.814 h |
| August | 36.0°C26.1°C | 26.1°C | 41 | 4.7 | 13.213 h |
| September, selected | 32.3°C22.8°C | 22.8°C | 65 | 7.5 | 12.412 h |
| October | 28.1°C17.9°C | 17.9°C | 55 | 6.0 | 11.511 h |
| November | 22.1°C12.0°C | 12.0°C | 29 | 4.3 | 10.711 h |
| December | 18.3°C7.8°C | 7.8°C | 22 | 3.8 | 10.310 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
- Piedras Negras in SeptemberMexico · 81 kmHigh 32.8°C · Low 23.2°C · 79 mm rain
- San Antonio in SeptemberUnited States · 238 kmHigh 31.6°C · Low 22.0°C · 77 mm rain
- San Angelo in SeptemberUnited States · 243 kmHigh 30.6°C · Low 20.0°C · 53 mm rain
- Nuevo Laredo in SeptemberMexico · 249 kmHigh 33.2°C · Low 23.7°C · 77 mm rain
- Monclova in SeptemberMexico · 273 kmHigh 29.5°C · Low 21.1°C · 95 mm rain
- New Braunfels in SeptemberUnited States · 277 kmHigh 31.3°C · Low 21.8°C · 74 mm rain
- Odessa in SeptemberUnited States · 311 kmHigh 29.6°C · Low 18.5°C · 45 mm rain
- Midland in SeptemberUnited States · 316 kmHigh 29.5°C · Low 18.6°C · 46 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 Acuña) is explained once on the Ciudad Acuña year overview and on the Sources, method and limits page.