Climate averages 1991–2020
Comitán weather
in September.
A warm, very wet month: the 8th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in Comitán: daytime highs average 23.5°C and nights cool to about 16.0°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 355 mm of rain on roughly 24 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 San Cristóbal de las Casas (76 km away). In September its highs average 20.3°C, 3.2°C cooler than Comitán, with 429 mm of rain.
Among the 153 cities listed in Mexico, Comitán ranks 111th of 153 for the warmest September highs and 149th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Comitán is 3.0°C cooler than that mean.
From September to October, average highs fall by 0.7°C to 22.8°C, and monthly rainfall falls from 355 mm to 218 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
Comitán climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.5°C12.4°C | 12.4°C | 6.5 | 1.2 | 11.311 h |
| February | 24.3°C12.8°C | 12.8°C | 3.3 | 0.6 | 11.612 h |
| March | 26.1°C13.6°C | 13.6°C | 8.8 | 2.0 | 12.012 h |
| April | 27.4°C15.1°C | 15.1°C | 35 | 6.0 | 12.512 h |
| May | 26.2°C16.0°C | 16.0°C | 154 | 16.7 | 12.913 h |
| June | 23.9°C16.3°C | 16.3°C | 288 | 22.7 | 13.113 h |
| July | 24.3°C15.8°C | 15.8°C | 127 | 13.7 | 13.013 h |
| August | 24.7°C16.0°C | 16.0°C | 222 | 17.3 | 12.713 h |
| September, selected | 23.5°C16.0°C | 16.0°C | 355 | 23.8 | 12.212 h |
| October | 22.8°C15.2°C | 15.2°C | 218 | 17.9 | 11.812 h |
| November | 22.3°C13.7°C | 13.7°C | 42 | 6.4 | 11.411 h |
| December | 22.3°C12.7°C | 12.7°C | 10 | 1.8 | 11.211 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
- San Cristóbal de las Casas in SeptemberMexico · 76 kmHigh 20.3°C · Low 13.1°C · 429 mm rain
- Tuxtla in SeptemberMexico · 119 kmHigh 28.2°C · Low 21.3°C · 341 mm rain
- Huehuetenango in SeptemberGuatemala · 125 kmHigh 21.7°C · Low 12.9°C · 236 mm rain
- Malacatán in SeptemberGuatemala · 148 kmHigh 26.4°C · Low 18.4°C · 462 mm rain
- Tapachula in SeptemberMexico · 149 kmHigh 28.0°C · Low 20.9°C · 697 mm rain
- Quetzaltenango in SeptemberGuatemala · 169 kmHigh 19.1°C · Low 13.8°C · 479 mm rain
- Totonicapán in SeptemberGuatemala · 169 kmHigh 19.1°C · Low 12.8°C · 264 mm rain
- Santa Cruz del Quiché in SeptemberGuatemala · 171 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 Comitán) is explained once on the Comitán year overview and on the Sources, method and limits page.