Climate averages 1991–2020
San Sebastián de los Reyes weather
in December.
A cool, moderately wet month: the 11th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in San Sebastián de los Reyes: daytime highs average 9.9°C and nights cool to about 1.7°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 43 mm of rain on roughly 7 days, which makes December a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 20 min on an average December day.
The nearest other city in this atlas is Alcobendas (2 km away). In December its highs average 9.7°C, about as warm as San Sebastián de los Reyes, with 43 mm of rain.
Among the 93 cities listed in Spain, San Sebastián de los Reyes ranks joint 79th of 93 for the warmest December highs and joint 33rd of 93 for the driest December (rainfall, lowest first). The mean December high of those 93 cities is 13.1°C; San Sebastián de los Reyes is 3.3°C cooler than that mean.
From December to January, average highs fall by 0.6°C to 9.3°C, and monthly rainfall falls from 43 mm to 38 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 Sebastián de los Reyes climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.3°C0.7°C | 0.7°C | 38 | 6.6 | 9.610 h |
| February | 11.2°C1.0°C | 1.0°C | 32 | 5.6 | 10.611 h |
| March | 14.8°C3.3°C | 3.3°C | 39 | 6.4 | 11.912 h |
| April | 17.3°C5.7°C | 5.7°C | 44 | 7.4 | 13.313 h |
| May | 21.6°C9.5°C | 9.5°C | 37 | 6.6 | 14.414 h |
| June | 27.4°C14.3°C | 14.3°C | 15 | 3.2 | 15.015 h |
| July | 31.4°C17.5°C | 17.5°C | 6.3 | 1.4 | 14.815 h |
| August | 31.1°C17.4°C | 17.4°C | 8.1 | 2.0 | 13.814 h |
| September | 25.8°C13.6°C | 13.6°C | 20 | 3.8 | 12.513 h |
| October | 19.4°C9.2°C | 9.2°C | 58 | 7.3 | 11.211 h |
| November | 13.1°C4.5°C | 4.5°C | 53 | 6.9 | 10.010 h |
| December, selected | 9.9°C1.7°C | 1.7°C | 43 | 6.8 | 9.39 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
- Alcobendas in DecemberSpain · 2 kmHigh 9.7°C · Low 1.6°C · 43 mm rain
- Chamartín in DecemberSpain · 11 kmHigh 9.6°C · Low 1.5°C · 43 mm rain
- Coslada in DecemberSpain · 16 kmHigh 10.1°C · Low 2.1°C · 45 mm rain
- Madrid in DecemberSpain · 17 kmHigh 9.9°C · Low 2.0°C · 43 mm rain
- Torrejón de Ardoz in DecemberSpain · 17 kmHigh 10.2°C · Low 2.2°C · 45 mm rain
- Pozuelo de Alarcón in DecemberSpain · 21 kmHigh 9.7°C · Low 1.8°C · 43 mm rain
- Las Rozas de Madrid in DecemberSpain · 22 kmHigh 9.4°C · Low 1.4°C · 43 mm rain
- Alcalá de Henares in DecemberSpain · 24 kmHigh 10.2°C · Low 2.0°C · 47 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 Sebastián de los Reyes) is explained once on the San Sebastián de los Reyes year overview and on the Sources, method and limits page.
Madrid, Chamartín and Alcobendas lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.