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September Weather in Billdal, Sweden

Last updated: August 27, 2025

In September, the average temperature in Billdal, Sweden hovers around 14°C (57°F), with a minimum of 2°C (37°F) and a comfortable maximum of 24°C (76°F). Be prepared for 99 mm (3.9 in) of precipitation spread across 14 days, and expect the air to feel quite humid with an average humidity of 85%.

September Temperature in Billdal

In September in Billdal, the average temperature is 14°C (57°F). Maximum temperatures can reach 24°C (76°F), while minimums can drop to as low as 2°C (37°F). Be sure to pack layers to comfortably enjoy all that Billdal has to offer during this time of year!

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

The chart illustrates September temperature patterns in Billdal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Billdal, September typically has an average temperature of 14°C (57°F), with highs reaching up to 24°C (76°F) and lows dropping to around 2°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec363437455362646357504337
Data source: Temperature data for Billdal 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 Billdal

In Billdal in September, the precipitation amount is 99 mm (3.9 in) over the course of 14 days.

September Precipitation Trends in Billdal

The chart displays monthly precipitation patterns in Billdal, 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 Billdal, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec53706538696178111991077278
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Billdal

In Billdal in September, humidity is 85%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and sluggish.

September Average Humidity in Billdal

This chart illustrates the average monthly humidity levels in Billdal, 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 Billdal is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%91%89%84%75%74%73%77%86%91%92%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Billdal

In Billdal 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 Billdal.

Maximum UV Index Levels in Billdal for September

The chart shows the monthly maximum UV Index (UVI) for Billdal 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 Billdal typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123567765211
Data source: Billdal 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 Billdal Compares to Other Months

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

This table compares monthly weather conditions in Billdal, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)53 mm (2.1 inches)92%low
February Weather1°C (35°F)70 mm (2.7 inches)91%low
March Weather3°C (38°F)65 mm (2.6 inches)89%moderate
April Weather7°C (45°F)38 mm (1.5 inches)84%moderate
May Weather12°C (53°F)69 mm (2.7 inches)75%high
June Weather17°C (62°F)61 mm (2.4 inches)73%high
July Weather18°C (64°F)78 mm (3.1 inches)73%high
August Weather17°C (63°F)111 mm (4.4 inches)77%high
September Weather14°C (57°F)99 mm (3.9 inches)85%moderate
October Weather10°C (50°F)106 mm (4.2 inches)91%low
November Weather6°C (43°F)72 mm (2.8 inches)92%low
December Weather3°C (37°F)78 mm (3.1 inches)91%low

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