September Weather in As, Sweden

Last updated: August 27, 2025

In September, the average temperature in As, Sweden hovers around 9°C (48°F). Expect a range where the minimum dips to -2°C (28°F) and the maximum peaks at 22°C (72°F). With an average precipitation of 73 mm (2.9 in) spread over 13 days, you might want to keep an umbrella handy. Additionally, the air is quite humid, with an average humidity level of 89%, making it feel even cooler.

September Temperature in As

In September in As, the average temperature is 9°C (48°F). Maximum temperatures can reach 22°C (72°F), while minimum temperatures can dip as low as -2°C (28°F). This variation makes it essential for travelers to pack layers to accommodate both warm and cool conditions.

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

The chart illustrates September temperature patterns in As, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In As, September typically has an average temperature of 9°C (48°F), with highs reaching up to 22°C (72°F) and lows dropping to around -2°C (28°F).

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

September Precipitation in As

In As in September, the precipitation amount is 73 mm (2.9 in) over the course of 13 days.

September Precipitation Trends in As

The chart displays monthly precipitation patterns in As, 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 As, September typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 13 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 As

In As in September humidity is 89%. With an average temperature of 9°C (48°F), this humidity feels like a chill that lingers in the air, wrapping around you like a damp blanket, making outdoor activities challenging and encouraging a cozy retreat indoors.

September Average Humidity in As

This chart illustrates the average monthly humidity levels in As, 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 As is approximately 89%, 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 As

In As 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 As, you can check the information here.

Maximum UV Index Levels in As for September

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

Data source: As 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 As Compares to Other Months

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

This table compares monthly weather conditions in As, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	49 mm (1.9 inches)	97%	low
February Weather	-7°C (20°F)	37 mm (1.4 inches)	95%	low
March Weather	-3°C (27°F)	43 mm (1.7 inches)	92%	moderate
April Weather	2°C (36°F)	36 mm (1.4 inches)	86%	moderate
May Weather	8°C (47°F)	46 mm (1.8 inches)	80%	moderate
June Weather	14°C (57°F)	69 mm (2.7 inches)	76%	high
July Weather	16°C (60°F)	89 mm (3.5 inches)	80%	high
August Weather	14°C (57°F)	73 mm (2.9 inches)	86%	moderate
September Weather	9°C (48°F)	73 mm (2.9 inches)	89%	moderate
October Weather	4°C (39°F)	78 mm (3.1 inches)	93%	low
November Weather	-1°C (30°F)	49 mm (1.9 inches)	94%	low
December Weather	-5°C (24°F)	65 mm (2.6 inches)	96%	low