September Weather in Hallsta, Sweden

Last updated: August 27, 2025

In September, the average temperature in Hallsta, Sweden hovers around 9°C (49°F), with a range that can dip to a brisk 1°C (34°F) and rise to a comfortable 20°C (69°F). Expect 78 mm (3.1 in) of precipitation spread across about 14 days, creating a humid environment with an average humidity of 92%. Be sure to pack accordingly for this chilly and wet climate!

September Temperature in Hallsta

In September in Hallsta, the average temperature is 9°C (49°F). Maximum temperatures can reach 20°C (69°F), while the minimum can drop as low as 1°C (34°F). It's advisable to pack layers to be prepared for varying conditions during your travels.

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

The chart illustrates September temperature patterns in Hallsta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hallsta, September typically has an average temperature of 9°C (49°F), with highs reaching up to 20°C (69°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in Hallsta

In Hallsta in September, the precipitation amount is 78 mm (3.1 in) over a period of 14 days.

September Precipitation Trends in Hallsta

The chart displays monthly precipitation patterns in Hallsta, 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 Hallsta, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 14 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 Hallsta

In Hallsta in September, humidity is 92%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making it uncomfortable for traveling; the air is heavy, and every step feels sluggish, as sweat clings to your skin despite the coolness.

September Average Humidity in Hallsta

This chart illustrates the average monthly humidity levels in Hallsta, 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 Hallsta is approximately 92%, 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 Hallsta

In Hallsta 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 Hallsta, you can check the information here.

Maximum UV Index Levels in Hallsta for September

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

Data source: Hallsta 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 Hallsta Compares to Other Months

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

This table compares monthly weather conditions in Hallsta, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	45 mm (1.8 inches)	99%	low
February Weather	-6°C (22°F)	31 mm (1.2 inches)	97%	low
March Weather	-2°C (28°F)	41 mm (1.6 inches)	94%	moderate
April Weather	2°C (36°F)	31 mm (1.2 inches)	89%	moderate
May Weather	7°C (45°F)	52 mm (2.0 inches)	86%	moderate
June Weather	13°C (56°F)	72 mm (2.8 inches)	81%	high
July Weather	15°C (59°F)	80 mm (3.1 inches)	82%	high
August Weather	14°C (57°F)	70 mm (2.8 inches)	90%	moderate
September Weather	9°C (49°F)	78 mm (3.1 inches)	92%	moderate
October Weather	4°C (40°F)	74 mm (2.9 inches)	95%	low
November Weather	-1°C (31°F)	45 mm (1.8 inches)	98%	low
December Weather	-4°C (25°F)	61 mm (2.4 inches)	100%	low