The climate in Collado-Villalba during September can be summarized as warm and reasonably dry.
September is in the fall / autumn in Collado-Villalba and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a comfortable 25°C (76°F), whilst at night 12°C (54°F) is normal.
| Daytime temperature | 24.7°C 76.4°F |
|---|---|
| Nightly temperature | 12.4°C 54.2°F |
| Average temperature | 18.5°C 65.3°F |
| Daily sunshine | 8.7 hrs |
| Avg rainfall | 35 mm 1.4 ins |
| Rainy days | 8 days |
| Sea temperature | 20.9°C 69.5°F |
| Humidity | 53% |
| Windspeed | 10.1kph 6 mph |
On average September is the 3rd driest month of the year in Collado-Villalba with around 35mm 1.4 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.7 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 Collado-Villalba in September 2025.
Best places to visit in September
| Hottest month: | July | 29.1°C 84.4°F |
|---|---|---|
| Driest month: | July | 15mm 0.6ins |
| Sunniest month: | August | 11.5hrs |
| Coldest month: | January | 7.9°C 46.2°F |
| Wettest month: | November | 69mm 2.7ins |