Monthly climate guide
Frankfurt weather in September
September in Frankfurt is typically warm, with average daytime highs around 22°C (72°F) and night-time lows near 11°C (51°F). The month usually brings about 43 mm of rain (fairly dry) and is often cloudy. Daytime highs are 5°C cooler than August and 6°C warmer than October.
What stands out in September
- In Frankfurt, September is early autumn.
- Comfortable temperatures make it easy to walk between Museumsufer and Römerberg.
- Skies are at their clearest this time of year.
- It cools down fast from here: October is about 6°C cooler.
Avg high
22°C
72°F
Avg low
11°C
51°F
Rainfall
43 mm
fairly dry
Humidity
68%
relative
Sky
65%
cloud · often cloudy
Frankfurt weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 4°C / 40°F | -1°C / 29°F | 60 mm | 93% | 83% |
| February | 6°C / 42°F | -2°C / 29°F | 38 mm | 88% | 77% |
| March | 11°C / 51°F | 1°C / 33°F | 37 mm | 82% | 68% |
| April | 16°C / 61°F | 4°C / 40°F | 39 mm | 75% | 65% |
| May | 20°C / 67°F | 8°C / 47°F | 65 mm | 71% | 70% |
| June | 24°C / 75°F | 13°C / 55°F | 63 mm | 67% | 71% |
| July | 27°C / 80°F | 15°C / 58°F | 66 mm | 61% | 68% |
| August | 27°C / 80°F | 15°C / 58°F | 61 mm | 62% | 67% |
| September | 22°C / 72°F | 11°C / 51°F | 43 mm | 68% | 65% |
| October | 16°C / 61°F | 6°C / 44°F | 54 mm | 82% | 73% |
| November | 9°C / 48°F | 2°C / 36°F | 50 mm | 90% | 80% |
| December | 6°C / 42°F | 0°C / 32°F | 69 mm | 94% | 84% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- A small travel umbrella, just in case
Is September a good time to visit Frankfurt?
Our Frankfurt guide recommends: May to September for warm, comfortable sightseeing weather.
Try apfelwein (apple wine) at a traditional Sachsenhausen tavern — it's a Frankfurt specialty rarely found elsewhere.
Best time to visit Frankfurt →Other Germany cities in September
Cite or embed this data
Writing about this destination? Copy a ready-made citation or embed a live widget — free, just keep the link.
Frankfurt weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/germany/frankfurt/september
<a href="https://weathercompare.eu/weather/germany/frankfurt/september">Frankfurt weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/germany/frankfurt" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Frankfurt weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/germany/frankfurt/september">Frankfurt weather in September</a> – WeatherCompare</p>
Frankfurt in September: quick answers
Is September a good time to visit Frankfurt?
Yes. September is one of the best months for Frankfurt, with highs around 22°C and about 43 mm of rain.
How warm is Frankfurt in September?
Average highs are about 22°C (72°F) and average lows about 11°C (51°F), based on 10 years of daily data.
Does it rain a lot in Frankfurt in September?
Frankfurt typically gets around 43 mm of rain in September — fairly dry.
When is the best time to visit Frankfurt?
May to September for warm, comfortable sightseeing weather.
Figures are long-term averages for the area around Frankfurt (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.