September Weather in Olen, Norway

Last updated: August 27, 2025

In September, the average temperature in Olen, Norway is a mild 12°C (55°F), with daily temperatures ranging from a minimum of 4°C (40°F) to a comfortable maximum of 22°C (71°F). Expect 253 mm (10.0 in) of precipitation spread over 18 days, contributing to an average humidity level of 90%. Stay prepared for a cozy, wet month!

September Temperature in Olen

In September in Olen, the average temperature is 12°C (55°F). Maximum temperatures can reach 22°C (71°F), while minimums can drop as low as 4°C (40°F). Be sure to pack layers to enjoy the mild yet varied weather while exploring!

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

The chart illustrates September temperature patterns in Olen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Olen, September typically has an average temperature of 12°C (55°F), with highs reaching up to 22°C (71°F) and lows dropping to around 4°C (40°F).

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

September Precipitation in Olen

In Olen in September, the precipitation amount is 253 mm (10.0 in) spread over 18 days.

September Precipitation Trends in Olen

The chart displays monthly precipitation patterns in Olen, 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 Olen, September typically receives around 253 mm (10.0 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 Olen

In Olen in September, humidity is 90%. With an average temperature of 12°C (55°F), this humidity feels like you're walking through a heavy mist, making every step feel sluggish and the air dense, which can be quite uncomfortable for traveling.

September Average Humidity in Olen

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

In Olen 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 Olen for better planning.

Maximum UV Index Levels in Olen for September

The chart shows the monthly maximum UV Index (UVI) for Olen 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 Olen typically reaches 4, which falls under the moderate exposure category.

Data source: Olen 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 Olen Compares to Other Months

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

This table compares monthly weather conditions in Olen, 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 (36°F)	178 mm (7.0 inches)	92%	low
February Weather	2°C (35°F)	187 mm (7.4 inches)	90%	low
March Weather	3°C (39°F)	190 mm (7.5 inches)	90%	moderate
April Weather	6°C (44°F)	121 mm (4.8 inches)	87%	moderate
May Weather	10°C (51°F)	115 mm (4.5 inches)	84%	moderate
June Weather	14°C (58°F)	165 mm (6.5 inches)	81%	high
July Weather	15°C (60°F)	167 mm (6.6 inches)	86%	high
August Weather	15°C (59°F)	252 mm (9.9 inches)	87%	moderate
September Weather	12°C (55°F)	253 mm (10.0 inches)	90%	moderate
October Weather	9°C (48°F)	330 mm (13.0 inches)	92%	low
November Weather	5°C (42°F)	225 mm (8.9 inches)	93%	low
December Weather	3°C (38°F)	227 mm (8.9 inches)	90%	low