Frankfurt in September
In September, Frankfurt averages 21°C (70°F) during the day and 12°C (53°F) at night, with frequent rain — about 14 days of the month see precipitation (52 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Frankfurt, with some rain to plan around.
How September compares to the rest of the year in Frankfurt
September is in the middle of the year for warmth in Frankfurt (4th of 12) and one of the driest months (12th of 12). Daytime temperature runs 6°C above the annual average (16°C). September runs 4°C cooler than August (25°C) and cools 6°C in October (16°C).
September sunrise & sunset in Frankfurt
Times shown for Frankfurt local time (Europe/Berlin), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Frankfurt — September
Golden-hour and blue-hour windows for the 15th of September, in Frankfurt's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Frankfurt in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Frankfurt's popularity.
September in Germany — events that affect travel
Known cultural, religious, or national events that surge prices, fill hotels, or close businesses during this month. Plan around them, or build your itinerary around the ones you'd like to see.
Munich hotels triple in price and book out 6+ months ahead. The festival itself draws 6M+ visitors. Other German cities are unaffected.
Plan: Don't try to wing it. Book accommodation 8+ months out, or stay an hour away by train.
Crowds & pricing — September in Frankfurt
This is a busy month in Frankfurt — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Frankfurt
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Frankfurt in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 5°C / 42°F | 1°C / 33°F | 72 mm | 21 | — |
| February | 8°C / 46°F | 0°C / 33°F | 45 mm | 16 | — |
| March | 11°C / 52°F | 2°C / 36°F | 51 mm | 17 | — |
| April | 16°C / 60°F | 5°C / 41°F | 45 mm | 16 | — |
| May | 20°C / 67°F | 10°C / 49°F | 65 mm | 17 | — |
| June | 25°C / 76°F | 15°C / 58°F | 58 mm | 16 | — |
| July | 26°C / 79°F | 16°C / 61°F | 63 mm | 17 | — |
| August | 25°C / 78°F | 16°C / 60°F | 60 mm | 18 | — |
| September | 21°C / 70°F | 12°C / 53°F | 52 mm | 14 | — |
| October | 16°C / 60°F | 8°C / 47°F | 55 mm | 18 | — |
| November | 9°C / 48°F | 4°C / 39°F | 64 mm | 18 | — |
| December | 6°C / 44°F | 2°C / 35°F | 74 mm | 19 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Frankfurt in September →
Frequently asked questions
How hot is Frankfurt in September?
In September, Frankfurt averages a high of 21°C (70°F) and a low of 12°C (53°F) — generally mild and pleasant.
Does it rain a lot in Frankfurt in September?
September can be fairly wet in Frankfurt, with about 14 rainy days on average.
Is September a good time to visit Frankfurt?
September is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Frankfurt in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Frankfurt for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.