Guadalajara Weather in September

The climate in Guadalajara during September can be summarized as warm, humid and wet.

September is in the fall / autumn in Guadalajara and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a muggy 28°C (82°F), whilst at night 16°C (60°F) is normal.

On average September is the 4th wettest month of the year in Guadalajara with around 150mm 5.9 inches of rain making it a wet time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.5 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 Guadalajara in September 2025.