September Weather in Arnes, Norway

Last updated: August 27, 2025

In Arnes, Norway, the average temperature in September hovers around 11°C (52°F), with a minimum dipping to 4°C (39°F) and a maximum reaching 20°C (68°F). Expect significant rainfall, with an average precipitation of 203 mm (8.0 in) spread over 17 days. The air tends to be quite moist, boasting an average humidity of 90%.

September Temperature in Arnes

In September in Arnes, the average temperature is 11°C (52°F). The maximum can reach 20°C (68°F), while the minimum can be as low as 4°C (39°F). This mild climate makes Arnes a great destination for outdoor activities during this time of year.

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

The chart illustrates September temperature patterns in Arnes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arnes, September typically has an average temperature of 11°C (52°F), with highs reaching up to 20°C (68°F) and lows dropping to around 4°C (39°F).

Data source: Temperature data for Arnes generated using information from the Copernicus Climate Change Service.

September Precipitation in Arnes

In Arnes in September, the total precipitation amount is 203 mm (8.0 in) spread out over 17 days.

September Precipitation Trends in Arnes

The chart displays monthly precipitation patterns in Arnes, 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 Arnes, September typically receives around 203 mm (8.0 inches) of precipitation spread over approximately 17 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Arnes

In Arnes in September, humidity is 90%. With an average temperature of 11°C (52°F), this humidity feels like a heavy blanket that clings to your skin, making travel uncomfortable and muggy.

September Average Humidity in Arnes

This chart illustrates the average monthly humidity levels in Arnes, 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 Arnes is approximately 90%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Arnes

In Arnes 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 Arnes, you can check the information here.

Maximum UV Index Levels in Arnes for September

The chart shows the monthly maximum UV Index (UVI) for Arnes 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 Arnes typically reaches 3, which falls under the moderate exposure category.

Data source: Arnes 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 Arnes Compares to Other Months

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

This table compares monthly weather conditions in Arnes, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	143 mm (5.6 inches)	96%	low
February Weather	0°C (31°F)	111 mm (4.4 inches)	94%	low
March Weather	1°C (34°F)	155 mm (6.1 inches)	91%	low
April Weather	4°C (40°F)	121 mm (4.8 inches)	86%	moderate
May Weather	8°C (47°F)	76 mm (3.0 inches)	83%	moderate
June Weather	13°C (55°F)	108 mm (4.3 inches)	81%	high
July Weather	15°C (59°F)	102 mm (4.0 inches)	81%	high
August Weather	14°C (57°F)	152 mm (6.0 inches)	88%	moderate
September Weather	11°C (52°F)	203 mm (8.0 inches)	90%	moderate
October Weather	7°C (45°F)	168 mm (6.6 inches)	93%	low
November Weather	3°C (38°F)	129 mm (5.1 inches)	95%	low
December Weather	1°C (33°F)	145 mm (5.7 inches)	97%	low