The climate in Guadarrama during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Guadarrama and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 10°C (51°F) is normal.
| Daytime temperature | 21.2°C 70.1°F |
|---|---|
| Nightly temperature | 10.3°C 50.5°F |
| Average temperature | 15.7°C 60.3°F |
| Daily sunshine | 8.4 hrs |
| Avg rainfall | 51 mm 2 ins |
| Rainy days | 9 days |
| Sea temperature | 20.9°C 69.5°F |
| Humidity | 57% |
| Windspeed | 11.2kph 7 mph |
On average September is the 3rd driest month of the year in Guadarrama with around 51mm 2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.4 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Guadarrama in September 2025.
Best places to visit in September
| Hottest month: | July | 25.2°C 77.4°F |
|---|---|---|
| Driest month: | August | 19mm 0.7ins |
| Sunniest month: | July | 12.3hrs |
| Coldest month: | January | 5°C 41°F |
| Wettest month: | November | 121mm 4.8ins |