Frankfurt Weather in September
In September, Frankfurt averages a high of 21°C (69°F) and a low of 11°C (52°F), from 53 years of daily records (1971–2026).
21°C
Average high
69°F
11°C
Average low
52°F
33°C
Record high
91°F · September 13, 2016
1°C
Record low
34°F · September 16, 1979
What September Is Like in Frankfurt
- September in Frankfurt has become 1.8°C (3.2°F) warmer on average: the 2011–2025 average against 1970–1989.
- 5 of the 10 warmest Septembers on record in Frankfurt have come since 2011.
- The coldest September reading, 1°C (34°F) on September 16, 1979, has not been matched in 47 years.
- The warmest September in the record was 2016; the coldest was 1972.
At least 1 mm of rain falls on 26% of September days, and the month averages 50 mm in total.
Warmest: 2023 (25.6°C)Latest: 2025 (20.7°C)10-year averageLong-run average (20.7°C)
Look Up a Day in September
See the weather in Frankfurt on any September date, year by year.
Source: NOAA GHCN-Daily, Frankfurt/Main-Westend (1985–2026); Frankfurt/Main (Stadt) (1971–1984). Averages cover 1971–2026. How we compute this