Climate averages 1991–2020
San Miguel de Allende weather
in September.
A warm, wet month: the joint 8th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in San Miguel de Allende: daytime highs average 23.8°C and nights cool to about 14.5°C. By daytime temperature it is the joint 8th warmest of the 12 months.
Expect about 100 mm of rain on roughly 12 days, which makes September a wet month (the 9th 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 Celaya (44 km away). In September its highs average 24.7°C, 0.9°C warmer than San Miguel de Allende, with 115 mm of rain.
Among the 153 cities listed in Mexico, San Miguel de Allende ranks joint 106th of 153 for the warmest September highs and joint 36th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; San Miguel de Allende is 2.7°C cooler than that mean.
From September to October, average highs stay level at 23.8°C, and monthly rainfall falls from 100 mm to 37 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 Miguel de Allende climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 22.0°C8.3°C | 8.3°C | 12 | 2.3 | 11.011 h |
| February | 24.2°C9.6°C | 9.6°C | 13 | 2.0 | 11.411 h |
| March | 26.7°C11.2°C | 11.2°C | 12 | 2.2 | 12.012 h |
| April | 28.8°C13.5°C | 13.5°C | 15 | 3.7 | 12.613 h |
| May | 29.1°C14.9°C | 14.9°C | 44 | 7.6 | 13.113 h |
| June | 26.8°C15.2°C | 15.2°C | 103 | 12.1 | 13.413 h |
| July | 24.9°C14.7°C | 14.7°C | 112 | 14.8 | 13.313 h |
| August | 25.1°C14.8°C | 14.8°C | 101 | 12.5 | 12.813 h |
| September, selected | 23.8°C14.5°C | 14.5°C | 100 | 12.2 | 12.312 h |
| October | 23.8°C12.6°C | 12.6°C | 37 | 6.4 | 11.712 h |
| November | 23.2°C10.7°C | 10.7°C | 12 | 2.3 | 11.211 h |
| December | 22.6°C9.2°C | 9.2°C | 4.4 | 1.0 | 10.911 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
- Celaya in SeptemberMexico · 44 kmHigh 24.7°C · Low 14.7°C · 115 mm rain
- Santiago de Querétaro in SeptemberMexico · 52 kmHigh 24.1°C · Low 14.5°C · 120 mm rain
- El Pueblito in SeptemberMexico · 52 kmHigh 23.6°C · Low 14.2°C · 120 mm rain
- Guanajuato in SeptemberMexico · 55 kmHigh 23.4°C · Low 13.8°C · 131 mm rain
- Salamanca, Mexico in SeptemberMexico · 61 kmHigh 25.3°C · Low 15.0°C · 122 mm rain
- Irapuato in SeptemberMexico · 69 kmHigh 25.1°C · Low 14.6°C · 115 mm rain
- Silao de la Victoria in SeptemberMexico · 71 kmHigh 24.8°C · Low 14.7°C · 114 mm rain
- San Juan del Río in SeptemberMexico · 97 kmHigh 22.8°C · Low 13.9°C · 98 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 Miguel de Allende) is explained once on the San Miguel de Allende year overview and on the Sources, method and limits page.