San Sebastián de los Reyes, Spain Climate
The warmest month is July, with an average high of 34°C; the coldest is January, with an average low of 1°C. A normal year brings 388 mm of precipitation.
Temperature through the year
The normal daily high and low and the record for every date at Madrid/Barajas, since 1945. The line marks today.
- Normal low
- Normal high
- Record high
- Record low
Normals for Sep 29
- Normal high
- 25°C
- Normal low
- 11°C
- Record high
- 32°Cin 1996
- Record low
- 2°Cin 1974
- Chance of a wet day
- 20%
- Daylight
- 11 h 51 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 | Record high | Record low | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 11°C | 1°C | 21°C (2003) | -15°C (1945) | 29 mm | 9.3 |
| February | 13°C | 1°C | 23°C (2026) | -15°C (1963) | 30 mm | 8.5 |
| March | 17°C | 4°C | 27°C (2015) | -7°C (2005) | 33 mm | 9.3 |
| April | 19°C | 6°C | 33°C (2023) | -4°C (1973) | 41 mm | 9.0 |
| May | 24°C | 10°C | 37°C (2015) | 0°C (1991) | 42 mm | 9.3 |
| June | 30°C | 14°C | 41°C (2019) | 4°C (1975) | 21 mm | 6.0 |
| July | 34°C | 17°C | 42°C (2022) | 7°C (1997) | 9 mm | 3.1 |
| August | 33°C | 17°C | 43°C (2021) | 7°C (1977) | 10 mm | 3.1 |
| September | 28°C | 13°C | 40°C (1988) | 2°C (1974) | 27 mm | 6.0 |
| October | 21°C | 9°C | 33°C (2023) | -2°C (1970) | 60 mm | 9.3 |
| November | 15°C | 4°C | 25°C (2009) | -7°C (1988) | 49 mm | 9.0 |
| December | 11°C | 1°C | 21°C (1979) | -10°C (2001) | 36 mm | 9.3 |
| Year | 21°C | 8°C | 388 mm | 91 |
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.
388 mm in a normal year, most in October.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around San Sebastián de los Reyes.
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 | 1°C | 84% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | 1°C | 78% | 100% | 0% | 0% | 0% | 0% | 0% |
| March | 2°C | 71% | 100% | 0% | 0% | 0% | 0% | 0% |
| April | 4°C | 67% | 100% | 0% | 0% | 0% | 0% | 0% |
| May | 6°C | 60% | 99% | 1% | 0% | 0% | 0% | 0% |
| June | 8°C | 47% | 97% | 3% | 0% | 0% | 0% | 0% |
| July | 7°C | 36% | 99% | 1% | 0% | 0% | 0% | 0% |
| August | 7°C | 36% | 98% | 2% | 0% | 0% | 0% | 0% |
| September | 7°C | 49% | 96% | 4% | 0% | 0% | 0% | 0% |
| October | 6°C | 66% | 98% | 2% | 0% | 0% | 0% | 0% |
| November | 4°C | 79% | 100% | 0% | 0% | 0% | 0% | 0% |
| December | 2°C | 84% | 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 July, with the sky 28 percent covered on average; the cloudiest is April, at 60 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 March, averaging 13.7 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 17, with 15 h 05 min of daylight; the shortest is Dec 19, with 9 h 16 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 Sebastián de los Reyes 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.
A record is the highest or lowest value on the date in every year the station has reported, back to 1945. It rests on one station, so a neighbor a few miles away can hold different ones.
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
Records: NOAA GHCN-Daily, station SPE00120278, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.