September Weather in Tornio, Finland

Last updated: August 23, 2025

In September, the average temperature in Tornio, Finland hovers around 10°C (51°F), with a minimum dipping to 0°C (32°F) and a maximum reaching 18°C (65°F). Expect 87 mm (3.4 in) of precipitation spread across 13 days, accompanied by a high average humidity of 89%. Prepare for a cool and damp environment!

September Temperature in Tornio

In September in Tornio, the average temperature is 10°C (51°F). The maximum can reach 18°C (65°F) and the minimum can be as low as 0°C (32°F). This mild climate makes it an ideal time for sightseeing and outdoor activities.

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

The chart illustrates September temperature patterns in Tornio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tornio, September typically has an average temperature of 10°C (51°F), with highs reaching up to 18°C (65°F) and lows dropping to around 0°C (32°F).

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

September Precipitation in Tornio

In Tornio in September, the precipitation amount is 87 mm (3.4 in) spread over 13 days.

September Precipitation Trends in Tornio

The chart displays monthly precipitation patterns in Tornio, 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 Tornio, September typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 13 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 Tornio

In Tornio in September humidity is 89%. With an average temperature of 10°C (51°F), this humidity feels like traveling through a thick fog, where the damp air clings to your skin, making the coolness feel even chillier and adding an element of discomfort to your adventures.

September Average Humidity in Tornio

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

In Tornio 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 Tornio, you can check the information here.

Maximum UV Index Levels in Tornio for September

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

Data source: Tornio 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 Tornio Compares to Other Months

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

This table compares monthly weather conditions in Tornio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	51 mm (2.0 inches)	99%	low
February Weather	-8°C (17°F)	48 mm (1.9 inches)	97%	low
March Weather	-5°C (24°F)	48 mm (1.9 inches)	93%	low
April Weather	-1°C (31°F)	37 mm (1.4 inches)	86%	moderate
May Weather	5°C (42°F)	52 mm (2.0 inches)	80%	moderate
June Weather	13°C (55°F)	58 mm (2.3 inches)	76%	high
July Weather	17°C (62°F)	61 mm (2.4 inches)	79%	high
August Weather	15°C (59°F)	91 mm (3.6 inches)	83%	moderate
September Weather	10°C (51°F)	87 mm (3.4 inches)	89%	moderate
October Weather	4°C (40°F)	109 mm (4.3 inches)	94%	low
November Weather	0°C (32°F)	82 mm (3.2 inches)	94%	low
December Weather	-4°C (25°F)	73 mm (2.9 inches)	98%	low