September Weather in Asker, Norway

Last updated: August 27, 2025

In September, the average temperature in Asker, Norway is a mild 13°C (55°F), with a minimum dipping to 1°C (35°F) and a maximum reaching up to 25°C (78°F). During this time, expect about 106 mm (4.2 in) of precipitation spread over 12 days, contributing to an average humidity of 86%. Ideal conditions for those who love a refreshing climate!

September Temperature in Asker

In September in Asker, the average temperature is 13°C (55°F). The maximum can reach 25°C (78°F), while the minimum can drop as low as 1°C (35°F). Be sure to pack layers for your trip, as temperatures can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Asker, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Asker, September typically has an average temperature of 13°C (55°F), with highs reaching up to 25°C (78°F) and lows dropping to around 1°C (35°F).

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

September Precipitation in Asker

In Asker in September, the precipitation amount is 106 mm (4.2 in), occurring over a span of 12 days.

September Precipitation Trends in Asker

The chart displays monthly precipitation patterns in Asker, 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 Asker, September typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 12 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 Asker

In Asker 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 Asker

This chart illustrates the average monthly humidity levels in Asker, 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 Asker is approximately 86%, 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 Asker

In Asker 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 Asker for better planning.

Maximum UV Index Levels in Asker for September

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

Data source: Asker 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 Asker Compares to Other Months

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

This table compares monthly weather conditions in Asker, 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 (28°F)	60 mm (2.4 inches)	94%	low
February Weather	-2°C (29°F)	66 mm (2.6 inches)	92%	low
March Weather	1°C (34°F)	66 mm (2.6 inches)	89%	moderate
April Weather	6°C (43°F)	36 mm (1.4 inches)	82%	moderate
May Weather	11°C (52°F)	81 mm (3.2 inches)	73%	moderate
June Weather	16°C (62°F)	84 mm (3.3 inches)	71%	high
July Weather	18°C (65°F)	93 mm (3.7 inches)	72%	high
August Weather	16°C (62°F)	87 mm (3.4 inches)	77%	moderate
September Weather	13°C (55°F)	106 mm (4.2 inches)	86%	moderate
October Weather	8°C (46°F)	128 mm (5.0 inches)	92%	low
November Weather	3°C (38°F)	103 mm (4.1 inches)	93%	low
December Weather	-1°C (30°F)	107 mm (4.2 inches)	93%	low