nomadseason

September Weather in Slagelse, Denmark

Last updated: August 23, 2025

In September, the average temperature in Slagelse, Denmark hovers around 15°C (59°F). Expect a cool minimum of 8°C (47°F) and pleasant highs reaching up to 25°C (77°F). During this month, you'll experience 79 mm (3.1 in) of precipitation over approximately 12 days. The air remains fairly moist with an average humidity of 83%, making it a typical, yet intriguing, month in this locale.

September Temperature in Slagelse

In September in Slagelse, the average temperature is 15°C (59°F). The maximum can reach 25°C (77°F), while the minimum can be as low as 8°C (47°F). This temperature range makes Slagelse a comfortable destination for travelers seeking mild weather.

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

The chart illustrates September temperature patterns in Slagelse, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Slagelse, September typically has an average temperature of 15°C (59°F), with highs reaching up to 25°C (77°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec383739455362646459534540
Data source: Temperature data for Slagelse generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Slagelse

In Slagelse in September, the precipitation amount is 79 mm (3.1 in) over a period of 12 days.

September Precipitation Trends in Slagelse

The chart displays monthly precipitation patterns in Slagelse, 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 Slagelse, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec625263365953789079955468
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Slagelse

In Slagelse in September humidity is 83%. With an average temperature of 15°C (59°F), this humidity feels like a cozy, damp embrace that can be quite stifling for traveling, making even short walks feel more exhausting than they should, and prompting a need for frequent breaks in shaded or air-conditioned areas.

September Average Humidity in Slagelse

This chart illustrates the average monthly humidity levels in Slagelse, 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 Slagelse is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%88%85%80%77%77%77%84%87%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Slagelse

In Slagelse in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Slagelse.

Maximum UV Index Levels in Slagelse for September

The chart shows the monthly maximum UV Index (UVI) for Slagelse 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 Slagelse typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123568765321
Data source: Slagelse 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 Slagelse Compares to Other Months

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

This table compares monthly weather conditions in Slagelse, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)61 mm (2.4 inches)90%low
February Weather3°C (37°F)52 mm (2.0 inches)89%low
March Weather4°C (39°F)62 mm (2.5 inches)88%moderate
April Weather7°C (45°F)36 mm (1.4 inches)85%moderate
May Weather12°C (53°F)59 mm (2.3 inches)80%high
June Weather17°C (62°F)53 mm (2.1 inches)77%very high
July Weather18°C (64°F)78 mm (3.1 inches)77%high
August Weather18°C (65°F)90 mm (3.5 inches)77%high
September Weather15°C (59°F)79 mm (3.1 inches)83%moderate
October Weather11°C (53°F)94 mm (3.7 inches)87%moderate
November Weather7°C (46°F)54 mm (2.1 inches)89%low
December Weather4°C (40°F)68 mm (2.7 inches)88%low

Compare Slagelse's Climate with Cities Worldwide