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September Weather in As, Norway

Last updated: August 27, 2025

In As, Norway, the average temperature in September hovers around 13°C (55°F). Expect a chilly minimum of 1°C (34°F) and a delightful maximum of 26°C (79°F). With 102 mm (4.0 in) of precipitation spread over 12 days, it's wise to keep an umbrella handy. The air is notably humid, with an average humidity of 86%, making for a refreshing but damp experience.

September Temperature in As

In September in As, the average temperature is 13°C (55°F). Maximums can reach 26°C (79°F) and minimums can be as low as 1°C (34°F). Travelers should be prepared for a range of temperatures, making layered clothing a wise choice during this time.

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

The chart illustrates September temperature patterns in As, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In As, September typically has an average temperature of 13°C (55°F), with highs reaching up to 26°C (79°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec292935435262656255463831
Data source: Temperature data for As 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 As

In As in September, the total precipitation amount is 102 mm (4.0 in), occurring over a span of 12 days.

September Precipitation Trends in As

The chart displays monthly precipitation patterns in As, 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 As, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5863633578799384102123103102
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in As

In As in September humidity is 86%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket clinging to your skin, making travel quite uncomfortable and urging you to seek cooler, dryer spots.

September Average Humidity in As

This chart illustrates the average monthly humidity levels in As, 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 As 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 As

In As 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 As for better planning.

Maximum UV Index Levels in As for September

The chart shows the monthly maximum UV Index (UVI) for As 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 As typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: As 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 As Compares to Other Months

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

This table compares monthly weather conditions in As, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)58 mm (2.3 inches)94%low
February Weather-2°C (30°F)63 mm (2.5 inches)92%low
March Weather1°C (35°F)63 mm (2.5 inches)89%moderate
April Weather6°C (43°F)34 mm (1.4 inches)82%moderate
May Weather11°C (52°F)78 mm (3.1 inches)73%moderate
June Weather17°C (62°F)79 mm (3.1 inches)71%high
July Weather18°C (65°F)93 mm (3.7 inches)72%high
August Weather16°C (62°F)84 mm (3.3 inches)77%moderate
September Weather13°C (55°F)102 mm (4.0 inches)86%moderate
October Weather8°C (46°F)123 mm (4.8 inches)92%low
November Weather3°C (38°F)103 mm (4.0 inches)93%low
December Weather-1°C (31°F)102 mm (4.0 inches)93%low

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