Climate averages 1991–2020
San Juan del Río weather
in September.
A warm, wet month: the 8th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in San Juan del Río: daytime highs average 22.8°C and nights cool to about 13.9°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 98 mm of rain on roughly 13 days, which makes September a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 16 min on an average September day.
The nearest other city in this atlas is Santiago de Querétaro (46 km away). In September its highs average 24.1°C, 1.3°C warmer than San Juan del Río, with 120 mm of rain.
Among the 153 cities listed in Mexico, San Juan del Río ranks 117th of 153 for the warmest September highs and joint 34th of 153 for the driest September (rainfall, lowest first). The mean September high of those 153 cities is 26.5°C; San Juan del Río is 3.7°C cooler than that mean.
From September to October, average highs fall by 0.4°C to 22.5°C, and monthly rainfall falls from 98 mm to 43 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 Juan del Río climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.7°C7.5°C | 7.5°C | 13 | 2.7 | 11.011 h |
| February | 24.0°C8.8°C | 8.8°C | 14 | 2.5 | 11.511 h |
| March | 26.5°C10.4°C | 10.4°C | 13 | 3.0 | 12.012 h |
| April | 28.4°C12.7°C | 12.7°C | 21 | 4.4 | 12.613 h |
| May | 28.3°C14.1°C | 14.1°C | 38 | 8.0 | 13.113 h |
| June | 25.8°C14.5°C | 14.5°C | 90 | 12.4 | 13.313 h |
| July | 24.0°C14.0°C | 14.0°C | 93 | 13.6 | 13.213 h |
| August | 24.3°C14.2°C | 14.2°C | 82 | 12.0 | 12.813 h |
| September, selected | 22.8°C13.9°C | 13.9°C | 98 | 13.3 | 12.312 h |
| October | 22.5°C11.9°C | 11.9°C | 43 | 7.0 | 11.712 h |
| November | 22.2°C9.8°C | 9.8°C | 16 | 3.1 | 11.211 h |
| December | 22.2°C8.4°C | 8.4°C | 4.9 | 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
- Santiago de Querétaro in SeptemberMexico · 46 kmHigh 24.1°C · Low 14.5°C · 120 mm rain
- El Pueblito in SeptemberMexico · 49 kmHigh 23.6°C · Low 14.2°C · 120 mm rain
- Celaya in SeptemberMexico · 86 kmHigh 24.7°C · Low 14.7°C · 115 mm rain
- Tepeji del Río de Ocampo in SeptemberMexico · 87 kmHigh 21.6°C · Low 12.9°C · 111 mm rain
- San Miguel de Allende in SeptemberMexico · 97 kmHigh 23.8°C · Low 14.5°C · 100 mm rain
- Heróica Zitácuaro in SeptemberMexico · 112 kmHigh 21.5°C · Low 12.2°C · 303 mm rain
- Zumpango in SeptemberMexico · 114 kmHigh 20.9°C · Low 12.0°C · 96 mm rain
- Cuautitlán Izcalli in SeptemberMexico · 116 kmHigh 20.2°C · Low 11.5°C · 125 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 Juan del Río) is explained once on the San Juan del Río year overview and on the Sources, method and limits page.