Sant Martí Vell Weather in September

The climate in Sant Martí Vell during September can be summarized as warm, humid and reasonably dry.

September is in the fall / autumn in Sant Martí Vell and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a muggy 25°C (78°F), whilst at night 15°C (59°F) is normal.

On average September is the 2nd wettest month of the year in Sant Martí Vell with around 72mm 2.8 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 6.9 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 Sant Martí Vell in September 2025.