September Weather in Kemijaervi, Finland

Last updated: August 23, 2025

In September, the average temperature in Kemijaervi, Finland hovers around 7°C (46°F). During this time, temperatures can fluctuate from a chilly -5°C (23°F) to a warm 22°C (72°F). Expect 68 mm (2.7 in) of precipitation spread over 12 days, with high humidity levels at 92%. Prepare accordingly for a month that balances cool temperatures with occasional warmth!

September Temperature in Kemijaervi

In September in Kemijaervi, the average temperature is 7°C (46°F), with maximums reaching 22°C (72°F) and minimums dropping as low as -5°C (23°F). Be prepared for a range of temperatures to ensure a comfortable and enjoyable visit.

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

The chart illustrates September temperature patterns in Kemijaervi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kemijaervi, September typically has an average temperature of 7°C (46°F), with highs reaching up to 22°C (72°F) and lows dropping to around -5°C (23°F).

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

September Precipitation in Kemijaervi

In Kemijaervi in September, the precipitation amount is 68 mm (2.7 in) over the course of 12 days.

September Precipitation Trends in Kemijaervi

The chart displays monthly precipitation patterns in Kemijaervi, 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 Kemijaervi, September typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 12 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 Kemijaervi

In Kemijaervi in September, humidity is 92%. With an average temperature of 7°C (46°F), this humidity feels like a cold, damp blanket enveloping you, making outdoor activities feel chilling and uncomfortable for travelers.

September Average Humidity in Kemijaervi

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

In Kemijaervi 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 Kemijaervi, you can check the information here.

Maximum UV Index Levels in Kemijaervi for September

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

Data source: Kemijaervi 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 Kemijaervi Compares to Other Months

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

This table compares monthly weather conditions in Kemijaervi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (14°F)	40 mm (1.6 inches)	101%	low
February Weather	-11°C (13°F)	36 mm (1.4 inches)	99%	low
March Weather	-6°C (22°F)	43 mm (1.7 inches)	93%	low
April Weather	0°C (32°F)	38 mm (1.5 inches)	88%	moderate
May Weather	5°C (42°F)	47 mm (1.9 inches)	83%	moderate
June Weather	13°C (55°F)	80 mm (3.2 inches)	80%	moderate
July Weather	16°C (61°F)	75 mm (2.9 inches)	83%	moderate
August Weather	13°C (55°F)	87 mm (3.4 inches)	87%	moderate
September Weather	7°C (46°F)	68 mm (2.7 inches)	92%	moderate
October Weather	1°C (35°F)	78 mm (3.1 inches)	97%	low
November Weather	-3°C (26°F)	59 mm (2.3 inches)	98%	low
December Weather	-7°C (19°F)	54 mm (2.1 inches)	101%	low