San Juan del Río, Mexico Climate
The warmest month is May, with an average high of 29°C; the coldest is January, with an average low of 5°C. A normal year brings 590 mm of precipitation.
Temperature through the year
The normal daily high and low. The line marks today.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
Normals for Sep 26
- Normal high
- 23°C
- Normal low
- 11°C
- Reanalysis high
- 28°Cin 2019
- Reanalysis low
- 8°Cin 1991
- Chance of a wet day
- 48%
- Daylight
- 12 h 02 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Warmest | Coldest | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 21°C | 5°C | 27°C (2009) | -4°C (2006) | 10 mm | 2.3 |
| February | 24°C | 7°C | 30°C (2019) | -3°C (1999) | 11 mm | 1.9 |
| March | 26°C | 8°C | 34°C (2020) | -3°C (2013) | 12 mm | 2.6 |
| April | 29°C | 11°C | 35°C (1998) | 4°C (2005) | 14 mm | 4.3 |
| May | 29°C | 13°C | 36°C (1998) | 5°C (2014) | 37 mm | 9.9 |
| June | 27°C | 13°C | 34°C (2005) | 7°C (2020) | 103 mm | 18.0 |
| July | 25°C | 13°C | 30°C (1998) | 8°C (1991) | 121 mm | 23.0 |
| August | 24°C | 12°C | 30°C (2019) | 8°C (1999) | 107 mm | 20.8 |
| September | 23°C | 12°C | 29°C (1997) | 3°C (2011) | 110 mm | 18.9 |
| October | 23°C | 10°C | 28°C (2019) | -2°C (1997) | 45 mm | 10.6 |
| November | 22°C | 8°C | 28°C (2020) | -3°C (2010) | 15 mm | 3.8 |
| December | 21°C | 6°C | 27°C (1997) | -3°C (2003) | 5 mm | 1.3 |
| Year | 24°C | 10°C | 590 mm | 117 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
590 mm in a normal year, most in July.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around San Juan del Río.
Days with a mean dew point of 18°C or more are rare here in every month.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | 3°C | 61% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | 3°C | 55% | 100% | 0% | 0% | 0% | 0% | 0% |
| March | 3°C | 48% | 100% | 0% | 0% | 0% | 0% | 0% |
| April | 4°C | 44% | 100% | 0% | 0% | 0% | 0% | 0% |
| May | 7°C | 52% | 99% | 1% | 0% | 0% | 0% | 0% |
| June | 11°C | 66% | 79% | 21% | 0% | 0% | 0% | 0% |
| July | 12°C | 74% | 71% | 29% | 0% | 0% | 0% | 0% |
| August | 12°C | 75% | 69% | 31% | 0% | 0% | 0% | 0% |
| September | 12°C | 78% | 59% | 41% | 0% | 0% | 0% | 0% |
| October | 10°C | 75% | 85% | 15% | 0% | 0% | 0% | 0% |
| November | 7°C | 71% | 99% | 1% | 0% | 0% | 0% | 0% |
| December | 5°C | 65% | 100% | 0% | 0% | 0% | 0% | 0% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is February, with the sky 35 percent covered on average; the cloudiest is September, at 64 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is August, averaging 14.0 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 19, with 13 h 23 min of daylight; the shortest is Dec 21, with 10 h 53 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in San Juan del Río in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Nearby
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.