San Cristóbal de las Casas weather in July
In July, San Cristóbal de las Casas has daytime highs averaging 21 °C, nights around 13 °C, with 22 wet days. Figures are 1991–2020 climate normals.
- 21.2°C Average high
- 13.0°C Average low
- 22days Wet days
- 304mm Rainfall
- 13h Daylight
Daily temperatures through July
How July develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 July | 21.0 °C | 13.1 °C | 75 % |
| 11–20 July | 21.1 °C | 12.9 °C | 70 % |
| 21–31 July | 21.4 °C | 13.0 °C | 67 % |
- Rain is most likely over days 1–10 of July (75 % of days) and least likely over days 21–31 (67 %).
What to expect
| Measure | Typical July | Share of the month |
|---|---|---|
| Days above 25 °C | 0 of 31 | 0 % |
| Days above 30 °C | 0 of 31 | 0 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 22 of 31 | 71 % |
Conditions in July
| Measure | Average |
|---|---|
| Mean temperature | 16 °C |
| Record high (1991–2020) | 24 °C |
| Record low (1991–2020) | 9.7 °C |
| Relative humidity | 81 % |
| Wind speed | 6.8 km/h |
| Cloud cover | 75 % |
Where San Cristóbal de las Casas ranks in July
| Ranking | Position | Value |
|---|---|---|
| The coolest places in North America in July | 14th of 50 | 21 °C |
July compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| May | 22.4 °C | 222 mm | 62 % |
| June | 21.0 °C | 480 mm | 82 % |
| July | 21.2 °C | 304 mm | 75 % |
| August | 21.2 °C | 375 mm | 76 % |
| September | 20.5 °C | 428 mm | 84 % |
See all twelve months for San Cristóbal de las Casas
- July is the 6th warmest month here.
- It is the 9th driest month of the year.
- It ranks 9th for least cloud cover.
- Days last about 13 hours from sunrise to sunset.
- It rains on 22 of 31 days — 71 % of the month.
- Nights are about 8.2 °C cooler than the middle of the day.
- The hottest July day on record since 1991 reached 24 °C, 3.1 °C above the usual daytime high.
QuestionsJuly in San Cristóbal de las Casas, answered
How warm is San Cristóbal de las Casas in July?
Daily highs average 21 °C and nights fall to about 13 °C, a spread of 8.2 °C between afternoon and dawn. That makes July the 5th warmest month of the year here.
Does it rain much in San Cristóbal de las Casas in July?
July averages 304 mm of rain, spread over about 22 of the 31 days — 71 % of the month. Cloud cover averages 75 % of the sky.
How long are the days in July?
San Cristóbal de las Casas averages 13 hours between sunrise and sunset in July. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.