Monthly climate guide
Copenhagen weather in September
With highs near 18°C (64°F) and lows around 12°C (54°F), September feels mild in Copenhagen. Rainfall averages about 53 mm (some rain) and the sky is often cloudy. Daytime highs are 3°C cooler than August and 5°C warmer than October.
What stands out in September
- Just 260 km apart, but Copenhagen runs about 2°C warmer than Skagen this month.
- There's little difference between day and night (around 6°C).
- Seasonally, September counts as early autumn in Copenhagen.
- It cools down fast from here: October is about 5°C cooler.
Avg high
18°C
64°F
Avg low
12°C
54°F
Rainfall
53 mm
some rain
Humidity
82%
relative
Sky
66%
cloud · often cloudy
Copenhagen weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 3°C / 37°F | 0°C / 32°F | 62 mm | 92% | 85% |
| February | 3°C / 37°F | 0°C / 31°F | 46 mm | 91% | 81% |
| March | 6°C / 42°F | 1°C / 34°F | 41 mm | 88% | 71% |
| April | 10°C / 50°F | 4°C / 39°F | 33 mm | 82% | 59% |
| May | 15°C / 59°F | 8°C / 47°F | 38 mm | 80% | 57% |
| June | 19°C / 65°F | 12°C / 54°F | 59 mm | 79% | 62% |
| July | 21°C / 69°F | 15°C / 58°F | 64 mm | 78% | 63% |
| August | 21°C / 70°F | 15°C / 59°F | 68 mm | 79% | 62% |
| September | 18°C / 64°F | 12°C / 54°F | 53 mm | 82% | 66% |
| October | 13°C / 55°F | 9°C / 47°F | 68 mm | 87% | 74% |
| November | 8°C / 46°F | 5°C / 41°F | 57 mm | 92% | 78% |
| December | 5°C / 41°F | 2°C / 36°F | 68 mm | 93% | 84% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- A small travel umbrella, just in case
Is September a good time to visit Copenhagen?
Compare the months in the chart above to find your ideal window.
Best time to visit Copenhagen →Other Denmark cities in September
Cite or embed this data
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Copenhagen weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/denmark/copenhagen/september
<a href="https://weathercompare.eu/weather/denmark/copenhagen/september">Copenhagen weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/denmark/copenhagen" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Copenhagen weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/denmark/copenhagen/september">Copenhagen weather in September</a> – WeatherCompare</p>
Copenhagen in September: quick answers
Is September a good time to visit Copenhagen?
Yes. September is one of the best months for Copenhagen, with highs around 18°C and about 53 mm of rain.
How warm is Copenhagen in September?
Average highs are about 18°C (64°F) and average lows about 12°C (54°F), based on 10 years of daily data.
Does it rain a lot in Copenhagen in September?
Copenhagen typically gets around 53 mm of rain in September — some rain.
Figures are long-term averages for the area around Copenhagen (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.