September Weather in Frosta, Norway

Last updated: August 27, 2025

In Frosta, Norway, the average temperature in September hovers around 11°C (52°F), with lows reaching 3°C (37°F) and highs climbing to 21°C (70°F). Expect a significant amount of rain, with 131 mm (5.2 in) of precipitation spread over 18 days. The air tends to be quite humid, with an average humidity level of 90%, making it a unique experience for visitors.

September Temperature in Frosta

In September in Frosta, the average temperature is 11°C (52°F). The maximum can reach 21°C (70°F), and the minimum can be as low as 3°C (37°F). Be sure to pack layers to stay comfortable during your travels, as temperatures can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Frosta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Frosta, September typically has an average temperature of 11°C (52°F), with highs reaching up to 21°C (70°F) and lows dropping to around 3°C (37°F).

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

September Precipitation in Frosta

In Frosta in September, the precipitation amount is 131 mm (5.2 in) over the course of 18 days.

September Precipitation Trends in Frosta

The chart displays monthly precipitation patterns in Frosta, 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 Frosta, September typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 18 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Frosta

In Frosta 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 Frosta

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

In Frosta 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 Frosta, you can check the information here.

Maximum UV Index Levels in Frosta for September

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

Data source: Frosta 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 Frosta Compares to Other Months

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

This table compares monthly weather conditions in Frosta, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	97 mm (3.8 inches)	96%	low
February Weather	-2°C (29°F)	77 mm (3.0 inches)	94%	low
March Weather	0°C (33°F)	115 mm (4.5 inches)	91%	low
April Weather	4°C (39°F)	102 mm (4.0 inches)	86%	moderate
May Weather	8°C (47°F)	75 mm (3.0 inches)	83%	moderate
June Weather	13°C (56°F)	99 mm (3.9 inches)	81%	high
July Weather	15°C (59°F)	99 mm (3.9 inches)	81%	high
August Weather	14°C (57°F)	131 mm (5.2 inches)	88%	moderate
September Weather	11°C (52°F)	131 mm (5.2 inches)	90%	moderate
October Weather	6°C (44°F)	124 mm (4.9 inches)	93%	low
November Weather	2°C (36°F)	91 mm (3.6 inches)	95%	low
December Weather	0°C (32°F)	108 mm (4.3 inches)	97%	low