Loreto Weather in September

The climate in Loreto during September can be summarized as very hot, humid and reasonably dry.

September is in the fall / autumn in Loreto and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a steamy 35°C (95°F), whilst at night 23°C (73°F) is normal.

On average September is the wettest month of the year in Loreto with around 48mm 1.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 2 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.8 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 Loreto in September 2025.