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September Weather in Mehamn, Norway

Last updated: August 27, 2025

In September, the average temperature in Mehamn, Norway hovers around 8°C (47°F), with a minimum dipping to 1°C (35°F) and a maximum peaking at 19°C (67°F). Expect a fair amount of rain, with 77 mm (3.0 in) of precipitation over approximately 15 days. The air feels quite moist, with an average humidity of 90%, adding a crispness to the chilly atmosphere.

September Temperature in Mehamn

In September in Mehamn, the average temperature is 8°C (47°F). Maximums can reach 19°C (67°F), while minimums can drop as low as 1°C (35°F). Pack layers and be prepared for a mix of mild and chilly weather during your visit.

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

The chart illustrates September temperature patterns in Mehamn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mehamn, September typically has an average temperature of 8°C (47°F), with highs reaching up to 19°C (67°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec252327323845515046383228
Data source: Temperature data for Mehamn 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 Mehamn

In Mehamn in September, the precipitation amount is 77 mm (3.0 in) over a span of 15 days.

September Precipitation Trends in Mehamn

The chart displays monthly precipitation patterns in Mehamn, 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 Mehamn, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec696191717572788677768664
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mehamn

In Mehamn in September, humidity is 90%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill enveloping you, making even short walks outside feel uncomfortable and heavy, as if the air is thick with moisture.

September Average Humidity in Mehamn

This chart illustrates the average monthly humidity levels in Mehamn, 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 Mehamn is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%87%86%81%85%88%89%90%89%89%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mehamn

In Mehamn in September, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Mehamn, you can visit Hourly UV Index in Mehamn.

Maximum UV Index Levels in Mehamn for September

The chart shows the monthly maximum UV Index (UVI) for Mehamn 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 Mehamn typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111244542110
Data source: Mehamn 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 Mehamn Compares to Other Months

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

This table compares monthly weather conditions in Mehamn, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)69 mm (2.7 inches)92%low
February Weather-5°C (24°F)61 mm (2.4 inches)90%low
March Weather-3°C (27°F)91 mm (3.6 inches)87%low
April Weather0°C (32°F)71 mm (2.8 inches)85%low
May Weather3°C (38°F)75 mm (2.9 inches)81%moderate
June Weather7°C (45°F)72 mm (2.8 inches)85%moderate
July Weather11°C (51°F)78 mm (3.1 inches)88%moderate
August Weather10°C (51°F)86 mm (3.4 inches)89%moderate
September Weather8°C (47°F)77 mm (3.0 inches)90%low
October Weather3°C (38°F)76 mm (3.0 inches)89%low
November Weather0°C (32°F)86 mm (3.4 inches)89%low
December Weather-2°C (28°F)64 mm (2.5 inches)89%low

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