Frankfurt/Main Weather in September
With daytime temperatures of 21°C (70°F) and nighttime lows of 11°C (52°F), September in Frankfurt/Main brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 60 mm (2.4 in) falls on average.
Rainfall in Frankfurt/Main in September
On average, there are about 12 days with rain during this month, averaging 60 mm (2.4 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Frankfurt/Main in September
Frankfurt/Main has perfect weather in September, with days reaching 21°C (70°F) and nights cooling to 11°C (52°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows of 11°C (52°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.
Sunshine in Frankfurt/Main in September
With about 158 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Frankfurt/Main.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Germany, check out our Frankfurt/Main's climate page.
Frankfurt/Main Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
21°C (70°F)
Chance of Rain
41%
Precipitation
60 mm (2.4 in)
Rainy days
12 days
Humidity
78% *
Sunshine
158 hours *
Percentage Sunshine
40% *
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Frankfurt/Main typically drop from around 22°C (72°F) at the start of September to approximately 18°C (64°F) by the end. Nights are cool, with lows typically ranging from 9°C (48°F) to 13°C (55°F).
Average temperatures in September
Historical weather for Frankfurt/Main in September
Browse day-by-day weather records for Frankfurt/Main spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Frankfurt/Main historical weather extremes in September
Based on 20 years of weather observations (2005-2025), these are the most extreme conditions recorded in Frankfurt/Main.
- Frankfurt/Main recorded its highest September temperature of 32°C (90°F) on September 5, 2024.
- The coldest September day was on September 25, 2025, with a maximum of 10°C (50°F).
- Frankfurt/Main registered its coldest September night on September 19, 2010, with temperatures dropping to 3°C (37°F).
Best Places in Germany in September
Find out more about the weather in Germany and which places have the best travel conditions in this month. See all of Germany in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Frankfurt/Main in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Frankfurt/Main in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Germany, check out our Frankfurt/Main's climate page.
Temperature Rainfall Sunshine Humidity
See the full Frankfurt/Main climate overview or explore weather in Germany.
