Fairbanks Weather in September

The climate in Fairbanks during September can be summarized as cool and dry.

September is in the fall / autumn in Fairbanks and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 13°C (55°F), whilst at night 1°C (34°F) is normal.

On average September is the 4th wettest month of the year in Fairbanks with around 30mm 1.2 inches of rain making it a 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 5.9 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 Fairbanks in September 2025.