September · Germany
Best time to visit Frankfurt in September Weather, crowds & prices
Weather in Frankfurt in September
Average temperature 17°C, 75 mm of rain, about 25 days with 6+ hours of sunshine and 75% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.5/10
Ranked #5 of 12 months
- Avg temp
- 17°C
- Rainfall
- 75 mm
- Humidity
- 75%
- Days with 6h+ sun
- 25
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Frankfurt scores 8.5/10 for sightseeing and cultural travel - an above-average month (#5 of 12). Expect around 17°C, 75 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Towers rise over the Main in Frankfurt, with the Römerberg old town and Museumsufer within walking distance.
September in Frankfurt — one of the year's strongest windows (5th)
Temperatures hover around 17°C (62°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 75 mm of rain this month — a flexible day or two helps — with about 25 days with 6+ hours of sunshine and 12.6 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Frankfurt at 8.5/10 (5th of 12), just behind August at 9.3/10.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Budget for mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Frankfurt in September?
- In September, Frankfurt averages 17°C, 75 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 8.5/10.
- Is September a good time to visit Frankfurt?
- September earns a 8.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Frankfurt in September?
- Expect about 75 mm of rain in September. Average humidity is 75% and there are about 25 days with 6+ hours of sunshine.
Curated in Frankfurt
Tickets & experiences
Things to do in Frankfurt
Frankfurt, Germany. Live activities and tours from GetYourGuide, matched to this destination.