Marfa Weather in September

The climate in Marfa during September can be summarized as warm and reasonably dry.

September is in the fall / autumn in Marfa and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (84°F), whilst at night 14°C (57°F) is normal.

On average September is the wettest month of the year in Marfa with around 75mm 2.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.5 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 Marfa in September 2025.