Climate averages 1991–2020
San Juan del Río weather
in December.
A warm, very dry month: the joint 10th warmest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in San Juan del Río: daytime highs average 22.2°C and nights cool to about 8.4°C. By daytime temperature it is the joint 10th warmest of the 12 months.
Expect about 4.9 mm of rain on roughly 1 day, which makes December a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 55 min on an average December day.
The nearest other city in this atlas is Santiago de Querétaro (46 km away). In December its highs average 23.1°C, 0.9°C warmer than San Juan del Río, with 4.1 mm of rain.
Among the 153 cities listed in Mexico, San Juan del Río ranks joint 76th of 153 for the warmest December highs and joint 16th of 153 for the driest December (rainfall, lowest first). The mean December high of those 153 cities is 22.7°C; San Juan del Río is 0.5°C cooler than that mean.
From December to January, average highs fall by 0.5°C to 21.7°C, and monthly rainfall rises from 4.9 mm to 13 mm.
The annual picture
December 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 | 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, selected | 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
December in nearby cities
- Santiago de Querétaro in DecemberMexico · 46 kmHigh 23.1°C · Low 9.1°C · 4.1 mm rain
- El Pueblito in DecemberMexico · 49 kmHigh 22.8°C · Low 8.4°C · 4.1 mm rain
- Celaya in DecemberMexico · 86 kmHigh 23.5°C · Low 8.9°C · 3.8 mm rain
- Tepeji del Río de Ocampo in DecemberMexico · 87 kmHigh 21.2°C · Low 7.2°C · 6.7 mm rain
- San Miguel de Allende in DecemberMexico · 97 kmHigh 22.6°C · Low 9.2°C · 4.4 mm rain
- Heróica Zitácuaro in DecemberMexico · 112 kmHigh 21.3°C · Low 8.3°C · 14 mm rain
- Zumpango in DecemberMexico · 114 kmHigh 20.4°C · Low 7.1°C · 4.4 mm rain
- Cuautitlán Izcalli in DecemberMexico · 116 kmHigh 19.7°C · Low 6.1°C · 10 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.