Climate averages 1991–2020

Tuxtla weather
in September.

A hot, very wet month: the 8th warmest and the 11th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 28.2°C Daytime mean, September

Average low 21.3°C Night-time mean, September

Rainfall 341 mm 28 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

September is a hot month in Tuxtla: daytime highs average 28.2°C and nights cool to about 21.3°C. By daytime temperature it is the 8th warmest of the 12 months.

Expect about 341 mm of rain on roughly 28 days, which makes September a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 15 min on an average September day.

The nearest other city in this atlas is San Cristóbal de las Casas (51 km away). In September its highs average 20.3°C, 7.9°C cooler than Tuxtla, with 429 mm of rain.

Among the 153 cities listed in Mexico, Tuxtla ranks joint 67th of 153 for the warmest September highs and 148th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Tuxtla is 1.7°C warmer than that mean.

From September to October, average highs fall by 0.7°C to 27.5°C, and monthly rainfall falls from 341 mm to 172 mm.

The annual picture

September in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Tuxtla climate table

1991–2020

Monthly climate averages for Tuxtla, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	27.2°C17.4°C	17.4°C	7.4	1.9	11.211 h
February	29.4°C18.2°C	18.2°C	5.1	1.4	11.612 h
March	31.5°C19.5°C	19.5°C	11	2.8	12.012 h
April	33.1°C21.2°C	21.2°C	33	7.3	12.513 h
May	32.0°C22.2°C	22.2°C	158	18.7	12.913 h
June	29.5°C21.6°C	21.6°C	369	26.9	13.113 h
July	29.5°C21.2°C	21.2°C	294	26.0	13.013 h
August	29.2°C21.4°C	21.4°C	326	26.7	12.713 h
September, selected	28.2°C21.3°C	21.3°C	341	27.8	12.212 h
October	27.5°C20.5°C	20.5°C	172	18.1	11.812 h
November	27.1°C19.0°C	19.0°C	45	6.5	11.411 h
December	27.1°C18.0°C	18.0°C	13	2.0	11.111 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

Distance from Tuxtla

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 limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Tuxtla) is explained once on the Tuxtla year overview and on the Sources, method and limits page.