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September Weather in Tranby, Norway

Last updated: August 27, 2025

In September, the average temperature in Tranby, Norway is a pleasant 12°C (54°F). Expect a minimum chill of 1°C (35°F) and a maximum warmth of 25°C (77°F). With 111 mm (4.4 in) of precipitation spread over 12 days, you'll want to keep an umbrella handy. The air is notably humid, with an average humidity of 86%, making it a uniquely cozy time of year.

September Temperature in Tranby

In September in Tranby, the average temperature is 12°C (54°F), with a maximum that can reach 25°C (77°F) and a minimum that can drop to 1°C (35°F). Overall, this range makes it an ideal time for travelers to enjoy mild weather while exploring the area.

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

The chart illustrates September temperature patterns in Tranby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tranby, September typically has an average temperature of 12°C (54°F), with highs reaching up to 25°C (77°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec262833415161646154453628
Data source: Temperature data for Tranby 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 Tranby

In Tranby, in September, the precipitation amount is 111 mm (4.4 in) over a span of 12 days.

September Precipitation Trends in Tranby

The chart displays monthly precipitation patterns in Tranby, 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 Tranby, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec6469714186929691111135105115
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Tranby

In Tranby in September, humidity is 86%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities uncomfortable and travel challenging due to the heavy, muggy atmosphere.

September Average Humidity in Tranby

This chart illustrates the average monthly humidity levels in Tranby, 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 Tranby is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%92%89%82%73%71%72%77%86%92%93%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Tranby

In Tranby in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Tranby for better planning.

Maximum UV Index Levels in Tranby for September

The chart shows the monthly maximum UV Index (UVI) for Tranby 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 Tranby typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457754211
Data source: Tranby 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 Tranby Compares to Other Months

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

This table compares monthly weather conditions in Tranby, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)64 mm (2.5 inches)94%low
February Weather-2°C (28°F)69 mm (2.7 inches)92%low
March Weather0°C (33°F)71 mm (2.8 inches)89%moderate
April Weather5°C (42°F)41 mm (1.6 inches)82%moderate
May Weather10°C (51°F)86 mm (3.4 inches)73%moderate
June Weather16°C (61°F)92 mm (3.6 inches)71%high
July Weather18°C (64°F)96 mm (3.8 inches)72%high
August Weather16°C (61°F)91 mm (3.6 inches)77%moderate
September Weather12°C (54°F)111 mm (4.4 inches)86%moderate
October Weather7°C (45°F)135 mm (5.3 inches)92%low
November Weather2°C (37°F)105 mm (4.1 inches)93%low
December Weather-2°C (28°F)115 mm (4.5 inches)93%low

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