Climate averages 1991–2020
Heroica Matamoros weather
in September.
A hot, wet month: the 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 Heroica Matamoros: daytime highs average 30.6°C and nights cool to about 24.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 108 mm of rain on roughly 16 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 Ciudad Río Bravo (60 km away). In September its highs average 32.4°C, 1.8°C warmer than Heroica Matamoros, with 94 mm of rain.
Among the 153 cities listed in Mexico, Heroica Matamoros ranks joint 26th of 153 for the warmest September highs and joint 44th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Heroica Matamoros is 4.1°C warmer than that mean.
From September to October, average highs fall by 2.2°C to 28.4°C, and monthly rainfall falls from 108 mm to 72 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
Heroica Matamoros climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.0°C13.7°C | 13.7°C | 32 | 5.7 | 10.711 h |
| February | 22.7°C15.4°C | 15.4°C | 27 | 5.3 | 11.311 h |
| March | 24.9°C17.7°C | 17.7°C | 38 | 5.6 | 12.012 h |
| April | 27.6°C20.6°C | 20.6°C | 47 | 5.9 | 12.813 h |
| May | 30.1°C23.6°C | 23.6°C | 45 | 7.0 | 13.413 h |
| June | 31.8°C25.6°C | 25.6°C | 58 | 10.3 | 13.714 h |
| July | 32.4°C26.0°C | 26.0°C | 64 | 8.8 | 13.614 h |
| August | 32.7°C26.1°C | 26.1°C | 52 | 10.3 | 13.013 h |
| September, selected | 30.6°C24.5°C | 24.5°C | 108 | 15.6 | 12.312 h |
| October | 28.4°C21.8°C | 21.8°C | 72 | 9.3 | 11.612 h |
| November | 24.8°C17.9°C | 17.9°C | 43 | 7.6 | 10.911 h |
| December | 22.0°C14.8°C | 14.8°C | 34 | 5.9 | 10.611 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
- Ciudad Río Bravo in SeptemberMexico · 60 kmHigh 32.4°C · Low 23.9°C · 94 mm rain
- Edinburg in SeptemberUnited States · 81 kmHigh 32.6°C · Low 23.8°C · 88 mm rain
- McAllen in SeptemberUnited States · 81 kmHigh 32.5°C · Low 23.8°C · 88 mm rain
- Reynosa in SeptemberMexico · 81 kmHigh 32.7°C · Low 23.9°C · 89 mm rain
- Mission in SeptemberUnited States · 90 kmHigh 32.7°C · Low 23.8°C · 88 mm rain
- Corpus Christi in SeptemberUnited States · 214 kmHigh 30.7°C · Low 23.8°C · 113 mm rain
- Linares in SeptemberMexico · 236 kmHigh 30.0°C · Low 20.5°C · 167 mm rain
- Ciudad Benito Juárez in SeptemberMexico · 260 kmHigh 29.2°C · Low 20.6°C · 120 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 Heroica Matamoros) is explained once on the Heroica Matamoros year overview and on the Sources, method and limits page.