Climate averages 1991–2020
San Sebastián de los Reyes weather
in September.
A warm, fairly dry month: the 4th warmest and the 4th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a warm month in San Sebastián de los Reyes: daytime highs average 25.8°C and nights cool to about 13.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 20 mm of rain on roughly 4 days, which makes September a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Alcobendas (2 km away). In September its highs average 25.8°C, about as warm as San Sebastián de los Reyes, with 20 mm of rain.
Among the 93 cities listed in Spain, San Sebastián de los Reyes ranks joint 48th of 93 for the warmest September highs and joint 10th of 93 for the driest September (rainfall, lowest first). The mean September high of those 93 cities is 25.5°C; San Sebastián de los Reyes is 0.3°C warmer than that mean.
From September to October, average highs fall by 6.5°C to 19.4°C, and monthly rainfall rises from 20 mm to 58 mm.
The annual picture
September 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, selected | 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 | 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
September in nearby cities
- Alcobendas in SeptemberSpain · 2 kmHigh 25.8°C · Low 13.7°C · 20 mm rain
- Chamartín in SeptemberSpain · 11 kmHigh 25.6°C · Low 13.5°C · 20 mm rain
- Coslada in SeptemberSpain · 16 kmHigh 26.5°C · Low 14.8°C · 23 mm rain
- Madrid in SeptemberSpain · 17 kmHigh 26.2°C · Low 14.4°C · 20 mm rain
- Torrejón de Ardoz in SeptemberSpain · 17 kmHigh 26.5°C · Low 14.5°C · 23 mm rain
- Pozuelo de Alarcón in SeptemberSpain · 21 kmHigh 25.8°C · Low 14.2°C · 20 mm rain
- Las Rozas de Madrid in SeptemberSpain · 22 kmHigh 25.6°C · Low 13.6°C · 20 mm rain
- Alcalá de Henares in SeptemberSpain · 24 kmHigh 26.6°C · Low 14.4°C · 28 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.