Weather in Copenhagen for September 2025
In general, the average temperature in Copenhagen at the beginning of September is 21.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.7 °C by the end of September.
Copenhagen in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 54.1 mm.
Temperatures
Rain 🌧️
Copenhagen in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2 21° | 3 21° | 4  21° | 5 22° | 6 22° | 7  22° |
| 8  23° | 9 22° | 10 21° | 11  20° | 12 19° | 13  17° | 14 18° |
| 15 17° | 16 18° | 17 19° | 18 19° | 19 18° | 20 18° | 21 18° |
| 22 18° | 23 17° | 24 16° | 25 17° | 26 16° | 27  16° | 28 16° |
| 29 15° | 30 14° |
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Temperatures trend during September in Copenhagen
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Sunny | 21° /13° | 0.4 mm | 6 | |
| 2 Sept. | Sunny | 21° /12° | 0 mm | 6 | |
| 3 Sept. | Sunny | 21° /14° | 0.1 mm | 5 | |
| 4 Sept. | Partly cloudy | 21° /14° | 0.2 mm | 6 | |
| 5 Sept. | Sunny | 22° /14° | 0 mm | 6 | |
| 6 Sept. | Partly cloudy | 22° /14° | 0 mm | 6 | |
| 7 Sept. | Overcast | 22° /14° | 1 mm | 6 | |
| 8 Sept. | Patchy rain possible | 23° /16° | 3.4 mm | 5 | |
| 9 Sept. | Sunny | 22° /15° | 4.9 mm | 5 | |
| 10 Sept. | Patchy rain possible | 21° /14° | 1.9 mm | 5 | |
| 11 Sept. | Moderate rain at times | 20° /14° | 6.3 mm | 5 | |
| 12 Sept. | Patchy rain possible | 19° /12° | 1 mm | 5 | |
| 13 Sept. | Cloudy | 17° /12° | 1.4 mm | 4 | |
| 14 Sept. | Overcast | 18° /12° | 0 mm | 4 | |
| 15 Sept. | Moderate or heavy rain shower | 17° /12° | 4.2 mm | 4 | |
| 16 Sept. | Patchy rain possible | 18° /13° | 1 mm | 5 | |
| 17 Sept. | Patchy rain possible | 19° /13° | 0.1 mm | 5 | |
| 18 Sept. | Overcast | 19° /13° | 0.6 mm | 5 | |
| 19 Sept. | Cloudy | 18° /11° | 0.4 mm | 5 | |
| 20 Sept. | Overcast | 18° /12° | 0.6 mm | 5 | |
| 21 Sept. | Sunny | 18° /12° | 0.3 mm | 5 | |
| 22 Sept. | Cloudy | 18° /12° | 0.6 mm | 5 | |
| 23 Sept. | Moderate rain at times | 17° /11° | 1.7 mm | 4 | |
| 24 Sept. | Overcast | 16° /11° | 1.3 mm | 4 | |
| 25 Sept. | Overcast | 17° /12° | 1.8 mm | 4 | |
| 26 Sept. | Partly cloudy | 16° /11° | 3.5 mm | 4 | |
| 27 Sept. | Heavy rain at times | 16° /12° | 6 mm | 4 | |
| 28 Sept. | Patchy rain possible | 16° /11° | 3 mm | 4 | |
| 29 Sept. | Moderate or heavy rain shower | 15° /10° | 6.3 mm | 4 | |
| 30 Sept. | Patchy rain possible | 14° /10° | 2.3 mm | 3 | |
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Guide for Copenhagen in September
In September, Copenhagen, Denmark experiences a transition from the late summer to early autumn, with gradually decreasing temperatures and increasing chances of rainfall.
At the beginning of the month, the weather in Copenhagen is generally mild, with average temperatures around 16° and occasional sunny days. However, as the month progresses, the temperatures begin to drop, and by the end of September, the average temperature hovers around 12°.
Additionally, the likelihood of rain showers increases towards the end of the month, so visitors should be prepared for some wet weather.
Copenhagen in September can be quite unpredictable, with the potential for both warm, pleasant days and cooler, damp conditions. It's advisable for travelers to pack layers and waterproof clothing to accommodate the changing weather.
Despite the variability, September can still be a lovely time to visit Copenhagen, as the city is less crowded than in the peak summer months, and the changing colors of the foliage add a beautiful backdrop to the city's charming streets and canals.
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Copenhagen in September - FAQ
September rainfall patterns in Copenhagen
UV exposure in Copenhagen during September
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