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September Weather in Namsos, Norway

Last updated: August 27, 2025

In September, the average temperature in Namsos, Norway hovers around 11°C (52°F). Expect cool conditions, with minimums dipping to 2°C (36°F) and highs of 20°C (69°F). Be prepared for 199 mm (7.8 in) of precipitation spread over 19 days, contributing to an average humidity level of 84%.

September Temperature in Namsos

In September in Namsos, the average temperature is 11°C (52°F), with maximums reaching up to 20°C (69°F) and minimums dropping as low as 2°C (36°F). This climate makes it a great time for travelers to explore the area's attractions while enjoying mild temperatures.

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

The chart illustrates September temperature patterns in Namsos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Namsos, September typically has an average temperature of 11°C (52°F), with highs reaching up to 20°C (69°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec302933404756595751433632
Data source: Temperature data for Namsos 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 Namsos

In Namsos in September, the total precipitation amount reaches 199 mm (7.8 in) over the course of 19 days.

September Precipitation Trends in Namsos

The chart displays monthly precipitation patterns in Namsos, 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 Namsos, September typically receives around 199 mm (7.8 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec1391011491277410696156199158124131
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Namsos

In Namsos in September, humidity is 84%. With an average temperature of 11°C (52°F), this humidity feels like a heavy blanket, making it uncomfortable for traveling as the dampness clings to your skin and can leave you feeling sluggish and fatigued.

September Average Humidity in Namsos

This chart illustrates the average monthly humidity levels in Namsos, 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 Namsos is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%80%75%78%79%81%84%87%86%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Namsos

In Namsos in September, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Namsos, you can check the information here.

Maximum UV Index Levels in Namsos for September

The chart shows the monthly maximum UV Index (UVI) for Namsos 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 Namsos typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112356643211
Data source: Namsos 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 Namsos Compares to Other Months

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

This table compares monthly weather conditions in Namsos, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)139 mm (5.5 inches)86%low
February Weather-2°C (29°F)101 mm (4.0 inches)84%low
March Weather1°C (34°F)149 mm (5.9 inches)83%low
April Weather4°C (40°F)127 mm (5.0 inches)80%moderate
May Weather8°C (48°F)74 mm (2.9 inches)75%moderate
June Weather13°C (56°F)106 mm (4.2 inches)78%high
July Weather15°C (59°F)96 mm (3.8 inches)79%high
August Weather14°C (57°F)156 mm (6.1 inches)81%moderate
September Weather11°C (52°F)199 mm (7.8 inches)84%moderate
October Weather6°C (43°F)158 mm (6.2 inches)87%low
November Weather2°C (36°F)124 mm (4.9 inches)86%low
December Weather0°C (32°F)131 mm (5.2 inches)85%low

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