September Weather in Trofors, Norway

Last updated: August 27, 2025

In September, the average temperature in Trofors, Norway hovers around 7°C (45°F), with a minimum dipping to -4°C (26°F) and a maximum reaching 17°C (63°F). Expect a fair amount of precipitation, with around 182 mm (7.2 in) spread over 19 days, and enjoy the fresh, crisp air that comes with a high average humidity of 91%.

September Temperature in Trofors

In September in Trofors, the average temperature is 7°C (45°F). Maximums can reach 17°C (63°F), and minimums can drop as low as -4°C (26°F). Be prepared for a mix of mild and chilly weather during your travels.

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

The chart illustrates September temperature patterns in Trofors, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trofors, September typically has an average temperature of 7°C (45°F), with highs reaching up to 17°C (63°F) and lows dropping to around -4°C (26°F).

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

September Precipitation in Trofors

In Trofors in September, the precipitation amount is 182 mm (7.2 in) over a period of 19 days.

September Precipitation Trends in Trofors

The chart displays monthly precipitation patterns in Trofors, 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 Trofors, September typically receives around 182 mm (7.2 inches) of precipitation spread over approximately 19 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 Trofors

In Trofors in September humidity is 91%. With an average temperature of 7°C (45°F), this humidity feels like a thick blanket wrapping around you, making it difficult to stay comfortable while traveling.

September Average Humidity in Trofors

This chart illustrates the average monthly humidity levels in Trofors, 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 Trofors is approximately 91%, 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 Trofors

In Trofors 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 Trofors, you can check the information here.

Maximum UV Index Levels in Trofors for September

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

Data source: Trofors 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 Trofors Compares to Other Months

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

This table compares monthly weather conditions in Trofors, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	202 mm (8.0 inches)	97%	low
February Weather	-7°C (19°F)	135 mm (5.3 inches)	94%	low
March Weather	-5°C (24°F)	221 mm (8.7 inches)	92%	moderate
April Weather	-1°C (31°F)	138 mm (5.4 inches)	88%	moderate
May Weather	4°C (40°F)	87 mm (3.4 inches)	82%	moderate
June Weather	10°C (51°F)	129 mm (5.1 inches)	79%	high
July Weather	13°C (55°F)	117 mm (4.6 inches)	83%	high
August Weather	11°C (52°F)	157 mm (6.2 inches)	89%	moderate
September Weather	7°C (45°F)	182 mm (7.2 inches)	91%	moderate
October Weather	2°C (36°F)	148 mm (5.8 inches)	94%	low
November Weather	-3°C (28°F)	150 mm (5.9 inches)	95%	low
December Weather	-6°C (22°F)	141 mm (5.5 inches)	96%	low