Climate averages 1991–2020
Tapachula weather
in September.
A hot, very wet month: the 11th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Tapachula: daytime highs average 28.0°C and nights cool to about 20.9°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 697 mm of rain on roughly 30 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 14 min on an average September day.
The nearest other city in this atlas is Malacatán (22 km away). In September its highs average 26.4°C, 1.6°C cooler than Tapachula, with 462 mm of rain.
Among the 153 cities listed in Mexico, Tapachula ranks 71st of 153 for the warmest September highs and 153rd of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Tapachula is 1.5°C warmer than that mean.
From September to October, average highs fall by 0.3°C to 27.7°C, and monthly rainfall falls from 697 mm to 617 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
Tapachula climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.8°C18.8°C | 18.8°C | 18 | 4.5 | 11.311 h |
| February | 30.6°C19.3°C | 19.3°C | 15 | 4.3 | 11.612 h |
| March | 31.1°C20.4°C | 20.4°C | 42 | 9.2 | 12.012 h |
| April | 31.3°C21.4°C | 21.4°C | 119 | 16.8 | 12.512 h |
| May | 29.8°C21.8°C | 21.8°C | 414 | 27.8 | 12.813 h |
| June | 28.4°C21.4°C | 21.4°C | 548 | 29.1 | 13.013 h |
| July | 28.9°C20.8°C | 20.8°C | 506 | 30.7 | 12.913 h |
| August | 28.9°C20.9°C | 20.9°C | 571 | 30.6 | 12.613 h |
| September, selected | 28.0°C20.9°C | 20.9°C | 697 | 29.5 | 12.212 h |
| October | 27.7°C20.5°C | 20.5°C | 617 | 29.9 | 11.812 h |
| November | 28.3°C19.8°C | 19.8°C | 245 | 21.4 | 11.411 h |
| December | 29.0°C19.1°C | 19.1°C | 44 | 9.4 | 11.311 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
- Malacatán in SeptemberGuatemala · 22 kmHigh 26.4°C · Low 18.4°C · 462 mm rain
- Coatepeque in SeptemberGuatemala · 48 kmHigh 26.0°C · Low 19.5°C · 629 mm rain
- Retalhuleu in SeptemberGuatemala · 75 kmHigh 28.1°C · Low 21.9°C · 456 mm rain
- Quetzaltenango in SeptemberGuatemala · 79 kmHigh 19.1°C · Low 13.8°C · 479 mm rain
- Mazatenango in SeptemberGuatemala · 91 kmHigh 27.1°C · Low 20.5°C · 542 mm rain
- Huehuetenango in SeptemberGuatemala · 96 kmHigh 21.7°C · Low 12.9°C · 236 mm rain
- Totonicapán in SeptemberGuatemala · 97 kmHigh 19.1°C · Low 12.8°C · 264 mm rain
- Santa Cruz del Quiché in SeptemberGuatemala · 120 kmHigh 21.2°C · Low 13.6°C · 264 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 Tapachula) is explained once on the Tapachula year overview and on the Sources, method and limits page.