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September Weather in Hammerfest, Norway

Last updated: August 27, 2025

In September, the average temperature in Hammerfest, Norway hovers around 8°C (47°F). You can expect a minimum of 1°C (34°F) and a comfortable maximum of 18°C (65°F). With 97 mm (3.8 in) of precipitation spread across 17 days, it's wise to pack an umbrella. Additionally, the average humidity is a brisk 91%, creating a unique and refreshing atmosphere.

September Temperature in Hammerfest

In September in Hammerfest, the average temperature is 8°C (47°F). The maximum can reach 18°C (65°F), and the minimum can be as low as 1°C (34°F). Be sure to pack both warm layers and lighter clothing for your travels, as the weather can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Hammerfest, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hammerfest, September typically has an average temperature of 8°C (47°F), with highs reaching up to 18°C (65°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec252528333845515147383228
Data source: Temperature data for Hammerfest 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 Hammerfest

In Hammerfest in September, the precipitation amount is 97 mm (3.8 in) spread over 17 days.

September Precipitation Trends in Hammerfest

The chart displays monthly precipitation patterns in Hammerfest, 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 Hammerfest, September typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec85831198686958390978210680
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hammerfest

In Hammerfest in September, humidity is 91%. With an average temperature of 8°C (47°F), this humidity feels like a chilly dampness that clings to your skin, making it important to dress in layers while traveling.

September Average Humidity in Hammerfest

This chart illustrates the average monthly humidity levels in Hammerfest, 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 Hammerfest is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%88%86%81%85%88%89%91%89%90%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hammerfest

In Hammerfest 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 Hammerfest, you can visit Hourly UV Index in Hammerfest.

Maximum UV Index Levels in Hammerfest for September

The chart shows the monthly maximum UV Index (UVI) for Hammerfest 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 Hammerfest typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111245542110
Data source: Hammerfest 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 Hammerfest Compares to Other Months

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

This table compares monthly weather conditions in Hammerfest, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)85 mm (3.3 inches)92%low
February Weather-4°C (25°F)83 mm (3.3 inches)90%low
March Weather-2°C (28°F)119 mm (4.7 inches)88%low
April Weather0°C (33°F)86 mm (3.4 inches)86%low
May Weather3°C (39°F)86 mm (3.4 inches)81%moderate
June Weather7°C (46°F)95 mm (3.7 inches)85%moderate
July Weather11°C (52°F)83 mm (3.3 inches)87%moderate
August Weather10°C (51°F)90 mm (3.5 inches)89%moderate
September Weather8°C (47°F)97 mm (3.8 inches)91%low
October Weather4°C (39°F)82 mm (3.2 inches)89%low
November Weather0°C (32°F)106 mm (4.2 inches)90%low
December Weather-2°C (28°F)80 mm (3.2 inches)90%low

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