Climate averages 1991–2020
Chamartín 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 Chamartín: daytime highs average 25.6°C and nights cool to about 13.5°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 Madrid (6 km away). In September its highs average 26.2°C, 0.6°C warmer than Chamartín, with 20 mm of rain.
Among the 93 cities listed in Spain, Chamartín ranks joint 51st 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; Chamartín is 0.1°C warmer than that mean.
From September to October, average highs fall by 6.5°C to 19.1°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
Chamartín climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.0°C0.5°C | 0.5°C | 38 | 6.6 | 9.610 h |
| February | 10.9°C0.9°C | 0.9°C | 32 | 5.6 | 10.611 h |
| March | 14.6°C3.1°C | 3.1°C | 39 | 6.4 | 11.912 h |
| April | 17.0°C5.5°C | 5.5°C | 44 | 7.4 | 13.313 h |
| May | 21.4°C9.4°C | 9.4°C | 37 | 6.6 | 14.414 h |
| June | 27.2°C14.2°C | 14.2°C | 15 | 3.2 | 15.015 h |
| July | 31.3°C17.5°C | 17.5°C | 6.3 | 1.4 | 14.815 h |
| August | 30.9°C17.4°C | 17.4°C | 8.1 | 2.0 | 13.814 h |
| September, selected | 25.6°C13.5°C | 13.5°C | 20 | 3.8 | 12.513 h |
| October | 19.1°C9.1°C | 9.1°C | 58 | 7.3 | 11.211 h |
| November | 12.8°C4.3°C | 4.3°C | 53 | 6.9 | 10.010 h |
| December | 9.6°C1.5°C | 1.5°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
- Madrid in SeptemberSpain · 6 kmHigh 26.2°C · Low 14.4°C · 20 mm rain
- Alcobendas in SeptemberSpain · 10 kmHigh 25.8°C · Low 13.7°C · 20 mm rain
- Coslada in SeptemberSpain · 11 kmHigh 26.5°C · Low 14.8°C · 23 mm rain
- San Sebastián de los Reyes in SeptemberSpain · 11 kmHigh 25.8°C · Low 13.6°C · 20 mm rain
- Pozuelo de Alarcón in SeptemberSpain · 12 kmHigh 25.8°C · Low 14.2°C · 20 mm rain
- Las Rozas de Madrid in SeptemberSpain · 17 kmHigh 25.6°C · Low 13.6°C · 20 mm rain
- Torrejón de Ardoz in SeptemberSpain · 18 kmHigh 26.5°C · Low 14.5°C · 23 mm rain
- Getafe in SeptemberSpain · 18 kmHigh 26.7°C · Low 14.8°C · 22 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 Chamartín) is explained once on the Chamartín year overview and on the Sources, method and limits page.
Madrid, Alcobendas and Las Rozas de Madrid lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.