September weather forecast
Frankfurt, Germany

The arrival of September signifies the onset of the Autumn season in Frankfurt. During September, daylight reduces to 12.6 hours and temperatures showcase a substantial drop from 10.5°C (50.9°F) to 20.3°C (68.5°F). Sunshine hours also decrease to 5.2 hours a day, indicating the end of long summer days. Despite the cool down from the summer heat, pleasant weather conditions still persist, making it a favourable time to explore the changing hues of the city.

Temperature

September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a moderately hot 25.1°C (77.2°F) in August to an agreeable 20.3°C (68.5°F). During September, the average low-temperature is a fresh 10.5°C (50.9°F).

Rainfall

In Frankfurt, during September, the rain falls for 12 days and regularly aggregates up to 53mm (2.09") of precipitation. Throughout the year, there are 169 rainfall days, and 629mm (24.76") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 37min.
On the first day of the month, sunrise is at 06:40 and sunset at 20:09. On the last day of September, sunrise is at 07:24 and sunset at 19:05 CEST.

Sunshine

The average sunshine in September is 5.2h.

UV index

In Frankfurt, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 4 in September translates into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Boost your sun resistance with garments that are densely woven yet spacious.