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September Weather in Copenhagen, United States

Last updated: June 24, 2025

In September, the average temperature in Copenhagen, United States is a mild 16°C (62°F). However, temperatures can vary widely, ranging from a chilly -1°C (31°F) to a warm 31°C (89°F). Expect approximately 84 mm (3.3 in) of precipitation over 9 days, contributing to an average humidity of 78%. Whether you're enjoying the sunshine or the rain, be prepared for a diverse climate!

September Temperature in Copenhagen

In September in Copenhagen, the average temperature is 16°C (62°F). The maximum can reach 31°C (89°F) and the minimum can be as low as -1°C (31°F). This wide range of temperatures makes it essential for travelers to pack accordingly, ensuring they're prepared for both warm days and cool nights.

September Weather in Copenhagen: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Copenhagen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Copenhagen, September typically has an average temperature of 16°C (62°F), with highs reaching up to 31°C (89°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec212431445665706861513627
Data source: Temperature data for Copenhagen generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Copenhagen

In Copenhagen in September, the precipitation amount is 84 mm (3.3 in) spread over 9 days.

September Precipitation Trends in Copenhagen

The chart displays monthly precipitation patterns in Copenhagen, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Copenhagen, September typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec100949512711211716912684169131110
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Copenhagen

In Copenhagen in September, humidity is 78%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities enjoyable yet slightly sticky. Travelers may find the weather pleasantly mild, though they'll appreciate having light, breathable clothing on hand to stay comfortable while exploring.

September Average Humidity in Copenhagen

This chart illustrates the average monthly humidity levels in Copenhagen, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Copenhagen is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Copenhagen

In Copenhagen in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Copenhagen.

Maximum UV Index Levels in Copenhagen for September

The chart shows the monthly maximum UV Index (UVI) for Copenhagen in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Copenhagen typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246899997532
Data source: Copenhagen September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Copenhagen Compares to Other Months

Weather in Copenhagen varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Copenhagen, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Copenhagen, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)100 mm (3.9 inches)90%low
February Weather-4°C (24°F)94 mm (3.7 inches)90%moderate
March Weather0°C (31°F)95 mm (3.7 inches)87%high
April Weather6°C (44°F)127 mm (5.0 inches)88%very high
May Weather14°C (57°F)112 mm (4.4 inches)82%very high
June Weather18°C (65°F)117 mm (4.6 inches)79%very high
July Weather21°C (71°F)169 mm (6.7 inches)78%very high
August Weather20°C (69°F)126 mm (5.0 inches)76%very high
September Weather16°C (62°F)84 mm (3.3 inches)78%high
October Weather10°C (51°F)169 mm (6.6 inches)84%moderate
November Weather2°C (36°F)131 mm (5.2 inches)89%moderate
December Weather-3°C (27°F)110 mm (4.3 inches)86%low

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