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September Weather in Rosendal, Norway

Last updated: August 27, 2025

In Rosendal, Norway, the average temperature in September hovers around 11°C (51°F). During this month, temperatures can dip as low as 2°C (36°F) and soar to a maximum of 21°C (70°F). Expect approximately 336 mm (13.2 in) of precipitation spread over 18 days, contributing to an average humidity of a notable 90%.

September Temperature in Rosendal

In September in Rosendal, the average temperature is 11°C (51°F). The maximum can reach 21°C (70°F), while the minimum can be as low as 2°C (36°F). This mild climate makes Rosendal an ideal destination for travelers seeking a comfortable getaway.

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

The chart illustrates September temperature patterns in Rosendal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosendal, September typically has an average temperature of 11°C (51°F), with highs reaching up to 21°C (70°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec303034394755575651433732
Data source: Temperature data for Rosendal 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 Rosendal

In Rosendal in September, the precipitation amount is 336 mm (13.2 in) during 18 days, indicating a relatively wet period.

September Precipitation Trends in Rosendal

The chart displays monthly precipitation patterns in Rosendal, 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 Rosendal, September typically receives around 336 mm (13.2 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec235227239155112196198256336365263274
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rosendal

In Rosendal in September, humidity is 90%. With an average temperature of 11°C (51°F), this humidity feels like a damp blanket wrapping around you, making traveling uncomfortable and sticky, as every step leaves you feeling sluggish and clinging to the air.

September Average Humidity in Rosendal

This chart illustrates the average monthly humidity levels in Rosendal, 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 Rosendal is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%90%87%84%81%86%87%90%92%93%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Rosendal

In Rosendal 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 Rosendal for better planning.

Maximum UV Index Levels in Rosendal for September

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

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

This table compares monthly weather conditions in Rosendal, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)235 mm (9.3 inches)92%low
February Weather-1°C (30°F)227 mm (8.9 inches)90%low
March Weather1°C (34°F)239 mm (9.4 inches)90%moderate
April Weather4°C (40°F)155 mm (6.1 inches)87%moderate
May Weather8°C (47°F)112 mm (4.4 inches)84%moderate
June Weather13°C (55°F)196 mm (7.7 inches)81%high
July Weather14°C (58°F)198 mm (7.8 inches)86%high
August Weather13°C (56°F)256 mm (10.1 inches)87%moderate
September Weather11°C (51°F)336 mm (13.2 inches)90%moderate
October Weather6°C (44°F)365 mm (14.4 inches)92%low
November Weather3°C (37°F)263 mm (10.3 inches)93%low
December Weather0°C (32°F)274 mm (10.8 inches)90%low

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