Climate averages 1991–2020
San Juan del Río weather
by month.
See how the year changes. April has the highest average daily maximum; December has the lowest average monthly rainfall.
Pleasant-weather months by our simple rule: JanuaryFebruaryMarchAprilMayOctoberNovemberDecember
Long-term climate patterns, not a forecast for a particular trip.
Across the year San Juan del Río averages a daytime high of 24.4°C and a nighttime low of 11.7°C, with about 525 mm of rain on roughly 83 days. April is the warmest month (average high 28.4°C) and January the coolest (21.7°C). September is the wettest month with 98 mm; December is the driest with 4.9 mm.
Months with pleasant weather by a simple rule (average high between 18°C and 29°C, average low of at least 5°C and at most 8 rain days): January, February, March, April, May, October, November and December. This looks at temperature and rain only, not humidity, wind, sea temperature or crowds.
The annual picture
A year in San Juan del Río
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 | 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
Nearby cities
- Santiago de QuerétaroMexico · 46 kmHigh 25.6°C · Low 12.4°C · 640 mm rain a year
- El PueblitoMexico · 49 kmHigh 25.1°C · Low 11.8°C · 640 mm rain a year
- CelayaMexico · 86 kmHigh 26.1°C · Low 12.4°C · 645 mm rain a year
- Tepeji del Río de OcampoMexico · 87 kmHigh 23.0°C · Low 10.5°C · 603 mm rain a year
- San Miguel de AllendeMexico · 97 kmHigh 25.1°C · Low 12.4°C · 565 mm rain a year
- Heróica ZitácuaroMexico · 112 kmHigh 23.0°C · Low 10.7°C · 1,783 mm rain a year
- ZumpangoMexico · 114 kmHigh 22.3°C · Low 10.0°C · 473 mm rain a year
- Cuautitlán IzcalliMexico · 116 kmHigh 21.5°C · Low 9.1°C · 694 mm rain a year
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 limitsWhat do the high and low temperatures mean?
We average the daily maximum and daily minimum for each calendar month over 1991–2020. They are not record extremes, a forecast range or temperatures at a fixed time of day.
How is a rain day counted?
A local calendar day (standard time, UTC-6, no daylight saving) with at least 1 mm of total precipitation counts as one rain day. We count these for each year and month, then average across 30 years. The average does not predict which days will be wet.
Where do the numbers come from?
ERA5-Land (temperature) and ERA5 (precipitation) reanalysis from the Copernicus Climate Change Service, read from the Open-Meteo open-data archive. Temperature comes from the 0.1° model cell at 20.40°, -100.00° (1 km from the city centre), adjusted up by 0.7°C for the difference between the city's elevation (1,923 m) and the cell's (2,023 m). Rain comes from the 0.25° cell at 20.50°, -100.00°. These are model estimates, not weather-station readings; coast, hills and city streets can differ.
Does this page show sunshine, humidity or sea temperature?
No. The data used here contain air temperature and precipitation only. Daylight hours are calculated from the city's latitude (sunrise to sunset), not measured sunshine.