September · Germany
Best time to visit Heidelberg in September Weather, crowds & prices
Weather in Heidelberg in September
Average temperature 17°C, 95 mm of rain, about 26 days with 6+ hours of sunshine and 74% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.2/10
Ranked #5 of 12 months
- Avg temp
- 17°C
- Rainfall
- 95 mm
- Humidity
- 74%
- Days with 6h+ sun
- 26
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
September in Heidelberg scores 8.2/10 for sightseeing and cultural travel - an above-average month (#5 of 12). Expect around 17°C, 95 mm of rain, and roughly 26 days with 6+ hours of sunshine this month.
Castle ruins look over the Neckar in Heidelberg, with the Old Bridge and Philosophers' Walk close by.
September in Heidelberg: strong conditions, 5th of 12
Temperatures hover around 17°C (62°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 95 mm of rain this month — a flexible day or two helps — with about 26 days with 6+ hours of sunshine and 12.6 hours of daylight to work around it.
That is 8.2/10 on the same scale — 5th of 12 months, versus 9.1/10 for the best month here.
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 Heidelberg in September?
- In September, Heidelberg averages 17°C, 95 mm of rain, and about 26 days with 6+ hours of sunshine. Its climate-comfort score is 8.2/10.
- Is September a good time to visit Heidelberg?
- September earns a 8.2/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Heidelberg in September?
- Expect about 95 mm of rain in September. Average humidity is 74% and there are about 26 days with 6+ hours of sunshine.
Curated in Heidelberg
Tickets & experiences
Things to do in Heidelberg
Heidelberg, Germany. Live activities and tours from GetYourGuide, matched to this destination.