Climate averages 1991–2020
Copenhagen weather
in September.
A mild, moderately wet month: the 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Copenhagen: daytime highs average 16.7°C and nights cool to about 11.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 59 mm of rain on roughly 10 days, which makes September a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 49 min on an average September day.
The nearest other city in this atlas is Malmö (28 km away). In September its highs average 16.8°C, about as warm as Copenhagen, with 53 mm of rain.
Among the 5 cities listed in Denmark, Copenhagen ranks 2nd of 5 for the warmest September highs and 3rd of 5 for the driest September (rainfall, lowest first). The mean September high of those 5 cities is 16.6°C; Copenhagen is 0.1°C warmer than that mean.
From September to October, average highs fall by 5.0°C to 11.7°C, and monthly rainfall rises from 59 mm to 60 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Copenhagen climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 3.0°C-0.5°C | -0.5°C | 50 | 11.7 | 7.78 h |
| February | 3.3°C-0.7°C | -0.7°C | 41 | 9.5 | 9.610 h |
| March | 6.0°C0.5°C | 0.5°C | 43 | 10.0 | 11.812 h |
| April | 10.8°C3.7°C | 3.7°C | 41 | 9.3 | 14.114 h |
| May | 15.4°C7.9°C | 7.9°C | 52 | 10.3 | 16.216 h |
| June | 18.6°C11.7°C | 11.7°C | 71 | 11.2 | 17.417 h |
| July | 20.9°C14.2°C | 14.2°C | 72 | 12.0 | 16.917 h |
| August | 20.6°C14.5°C | 14.5°C | 77 | 12.8 | 15.115 h |
| September, selected | 16.7°C11.5°C | 11.5°C | 59 | 10.2 | 12.813 h |
| October | 11.7°C7.6°C | 7.6°C | 60 | 11.7 | 10.511 h |
| November | 7.2°C4.0°C | 4.0°C | 50 | 11.0 | 8.48 h |
| December | 4.1°C0.9°C | 0.9°C | 53 | 11.5 | 7.27 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Malmö in SeptemberSweden · 28 kmHigh 16.8°C · Low 11.1°C · 53 mm rain
- Lund in SeptemberSweden · 39 kmHigh 16.6°C · Low 10.5°C · 58 mm rain
- Helsingborg in SeptemberSweden · 42 kmHigh 16.7°C · Low 10.8°C · 62 mm rain
- Halmstad in SeptemberSweden · 112 kmHigh 16.4°C · Low 10.5°C · 76 mm rain
- Odense in SeptemberDenmark · 140 kmHigh 17.2°C · Low 11.4°C · 51 mm rain
- Århus in SeptemberDenmark · 156 kmHigh 16.6°C · Low 11.2°C · 54 mm rain
- Rostock in SeptemberGermany · 179 kmHigh 17.8°C · Low 11.7°C · 55 mm rain
- Växjö in SeptemberSweden · 192 kmHigh 15.5°C · Low 9.5°C · 59 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Copenhagen) is explained once on the Copenhagen year overview and on the Sources, method and limits page.