Climate averages 1991–2020
Guanajuato weather
in September.
A warm, wet month: the 9th 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 Guanajuato: daytime highs average 23.4°C and nights cool to about 13.8°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 131 mm of rain on roughly 14 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 Silao de la Victoria (19 km away). In September its highs average 24.8°C, 1.3°C warmer than Guanajuato, with 114 mm of rain.
Among the 153 cities listed in Mexico, Guanajuato ranks 112th of 153 for the warmest September highs and joint 69th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; Guanajuato is 3.1°C cooler than that mean.
From September to October, average highs rise by 0.1°C to 23.5°C, and monthly rainfall falls from 131 mm to 47 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
Guanajuato climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.4°C8.0°C | 8.0°C | 13 | 2.4 | 11.011 h |
| February | 23.8°C9.3°C | 9.3°C | 13 | 2.0 | 11.411 h |
| March | 26.3°C11.1°C | 11.1°C | 13 | 2.1 | 12.012 h |
| April | 28.6°C13.5°C | 13.5°C | 14 | 2.9 | 12.613 h |
| May | 29.1°C14.9°C | 14.9°C | 48 | 8.5 | 13.113 h |
| June | 26.8°C14.9°C | 14.9°C | 133 | 14.2 | 13.413 h |
| July | 24.4°C14.1°C | 14.1°C | 160 | 17.7 | 13.313 h |
| August | 24.6°C14.1°C | 14.1°C | 141 | 15.9 | 12.813 h |
| September, selected | 23.4°C13.8°C | 13.8°C | 131 | 14.4 | 12.312 h |
| October | 23.5°C12.0°C | 12.0°C | 47 | 7.0 | 11.712 h |
| November | 22.9°C10.1°C | 10.1°C | 13 | 2.5 | 11.211 h |
| December | 21.9°C8.7°C | 8.7°C | 5.8 | 1.3 | 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
- Silao de la Victoria in SeptemberMexico · 19 kmHigh 24.8°C · Low 14.7°C · 114 mm rain
- Irapuato in SeptemberMexico · 40 kmHigh 25.1°C · Low 14.6°C · 115 mm rain
- León de los Aldama in SeptemberMexico · 45 kmHigh 24.2°C · Low 14.0°C · 100 mm rain
- Salamanca, Mexico in SeptemberMexico · 50 kmHigh 25.3°C · Low 15.0°C · 122 mm rain
- San Miguel de Allende in SeptemberMexico · 55 kmHigh 23.8°C · Low 14.5°C · 100 mm rain
- San Francisco del Rincón in SeptemberMexico · 62 kmHigh 24.7°C · Low 14.8°C · 100 mm rain
- Celaya in SeptemberMexico · 72 kmHigh 24.7°C · Low 14.7°C · 115 mm rain
- Lagos de Moreno in SeptemberMexico · 79 kmHigh 23.9°C · Low 14.0°C · 108 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 Guanajuato) is explained once on the Guanajuato year overview and on the Sources, method and limits page.