September Weather in Lieksa, Finland

Last updated: August 23, 2025

The average temperature in Lieksa, Finland during September is a cool 10°C (50°F), with minimums dipping to -1°C (30°F) and maximums reaching up to 22°C (72°F). Expect 81 mm (3.2 in) of precipitation over approximately 13 days, contributing to an average humidity level of a high 92%. Stay prepared for a mix of weather!

September Temperature in Lieksa

In September in Lieksa, the average temperature is 10°C (50°F). Maximums can reach 22°C (72°F) and minimums can be as low as -1°C (30°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates September temperature patterns in Lieksa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lieksa, September typically has an average temperature of 10°C (50°F), with highs reaching up to 22°C (72°F) and lows dropping to around -1°C (30°F).

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

September Precipitation in Lieksa

In Lieksa in September, the precipitation amount is 81 mm (3.2 in) over the course of 13 days.

September Precipitation Trends in Lieksa

The chart displays monthly precipitation patterns in Lieksa, 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 Lieksa, September typically receives around 81 mm (3.2 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 Lieksa

In Lieksa in September humidity is 92%. With an average temperature of 10°C (50°F), this humidity feels like a chilly, damp cloak wrapping around you, making every step outside feel heavy and each breath a bit more labored, turning exploring into an uncomfortable challenge.

September Average Humidity in Lieksa

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

In Lieksa 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 Lieksa, you can check the information here.

Maximum UV Index Levels in Lieksa for September

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

Data source: Lieksa 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 Lieksa Compares to Other Months

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

This table compares monthly weather conditions in Lieksa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (19°F)	49 mm (1.9 inches)	99%	low
February Weather	-8°C (18°F)	48 mm (1.9 inches)	98%	low
March Weather	-4°C (26°F)	51 mm (2.0 inches)	95%	moderate
April Weather	1°C (35°F)	43 mm (1.7 inches)	87%	moderate
May Weather	8°C (46°F)	64 mm (2.5 inches)	78%	moderate
June Weather	15°C (59°F)	66 mm (2.6 inches)	75%	high
July Weather	17°C (62°F)	95 mm (3.7 inches)	83%	high
August Weather	15°C (59°F)	97 mm (3.8 inches)	88%	moderate
September Weather	10°C (50°F)	81 mm (3.2 inches)	92%	moderate
October Weather	4°C (40°F)	86 mm (3.4 inches)	95%	low
November Weather	0°C (32°F)	70 mm (2.8 inches)	94%	low
December Weather	-4°C (24°F)	68 mm (2.7 inches)	98%	low