When to go · Troisdorf
Troisdorf in September
Great month. Inside Troisdorf's best window: Apr–Oct.
Key facts
- Verdict
- Great
- Temperature
- 22°C (72°F)72°F (22°C) / 13°C (55°F)55°F (13°C)
- average high / low
- Rain days
- 7
- Crowds
- Medium
- Germany overall
- Prices
- High
- Germany overall
Verdict
Inside Troisdorf's best window: Apr–Oct.
Is another month better than September?
No other month rates higher than September for Troisdorf in this guide.
Weather in September
- TroisdorfHighs around 22 °C (72 °F), lows around 13 °C (55 °F), rain on about 7 daysHighs around 72 °F (22 °C), lows around 55 °F (13 °C), rain on about 7 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Oktoberfest (Munich) big impact
Mid Sep – early Oct (19 Sep – 4 Oct 2026) · Germany
Munich hotels triple in price; trains from Munich crowded in the evenings.
Crowds and prices
- Crowds · Germany overall
- Medium
- Prices · Germany overall
- High
Germany overall: Best all-round month; Oktoberfest starts in the second half and Munich prices triple.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Troisdorf, side by side.
Verdict
Sep: Great
Apr: Great
Daytime high
Sep: 22 °C (72 °F)72 °F (22 °C)
Apr: 15 °C (59 °F)59 °F (15 °C)
Night low
Sep: 13 °C (55 °F)55 °F (13 °C)
Apr: 6 °C (43 °F)43 °F (6 °C)
Rain days
Sep: 7 (better)
Apr: 8
Crowds
Sep: Medium
Apr: Medium
Prices
Sep: High
Apr: Medium
Festivals listed
Sep: 1
Apr: 0
September: Inside Troisdorf's best window: Apr–Oct.
April: Inside Troisdorf's best window: Apr–Oct.
Troisdorf: figures are long-term averages from this guide, not a forecast.
What to pack
Nothing unusual for the weather this month.