Climate averages 1991–2020
San Luis Potosí weather
in September.
A warm, moderately wet month: the 7th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in San Luis Potosí: daytime highs average 23.2°C and nights cool to about 14.5°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 82 mm of rain on roughly 12 days, which makes September a moderately wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average September day.
The nearest other city in this atlas is Soledad de Graciano Sánchez (5 km away). In September its highs average 23.2°C, about as warm as San Luis Potosí, with 82 mm of rain.
Among the 153 cities listed in Mexico, San Luis Potosí ranks joint 114th of 153 for the warmest September highs and joint 22nd of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; San Luis Potosí is 3.3°C cooler than that mean.
From September to October, average highs fall by 0.5°C to 22.7°C, and monthly rainfall falls from 82 mm to 42 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
San Luis Potosí climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 20.3°C6.4°C | 6.4°C | 15 | 3.0 | 10.911 h |
| February | 22.9°C7.9°C | 7.9°C | 14 | 2.5 | 11.411 h |
| March | 25.5°C9.9°C | 9.9°C | 15 | 3.4 | 12.012 h |
| April | 27.9°C12.5°C | 12.5°C | 22 | 4.5 | 12.613 h |
| May | 28.3°C14.7°C | 14.7°C | 50 | 9.2 | 13.213 h |
| June | 26.3°C15.5°C | 15.5°C | 73 | 11.3 | 13.513 h |
| July | 24.8°C15.0°C | 15.0°C | 83 | 10.5 | 13.313 h |
| August | 25.2°C15.1°C | 15.1°C | 62 | 9.8 | 12.913 h |
| September, selected | 23.2°C14.5°C | 14.5°C | 82 | 12.4 | 12.312 h |
| October | 22.7°C12.2°C | 12.2°C | 42 | 7.1 | 11.712 h |
| November | 21.5°C9.2°C | 9.2°C | 17 | 3.2 | 11.111 h |
| December | 20.9°C7.3°C | 7.3°C | 10 | 1.8 | 10.811 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
- Soledad de Graciano Sánchez in SeptemberMexico · 5 kmHigh 23.2°C · Low 14.6°C · 82 mm rain
- Guanajuato in SeptemberMexico · 130 kmHigh 23.4°C · Low 13.8°C · 131 mm rain
- Lagos de Moreno in SeptemberMexico · 133 kmHigh 23.9°C · Low 14.0°C · 108 mm rain
- León de los Aldama in SeptemberMexico · 136 kmHigh 24.2°C · Low 14.0°C · 100 mm rain
- Aguascalientes in SeptemberMexico · 139 kmHigh 24.3°C · Low 14.2°C · 90 mm rain
- San Miguel de Allende in SeptemberMexico · 140 kmHigh 23.8°C · Low 14.5°C · 100 mm rain
- Silao de la Victoria in SeptemberMexico · 142 kmHigh 24.8°C · Low 14.7°C · 114 mm rain
- San Francisco del Rincón in SeptemberMexico · 156 kmHigh 24.7°C · Low 14.8°C · 100 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 San Luis Potosí) is explained once on the San Luis Potosí year overview and on the Sources, method and limits page.
Soledad de Graciano Sánchez lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.