September Weather in Keminmaa, Finland

Last updated: August 23, 2025

In September, the average temperature in Keminmaa, Finland hovers around 10°C (50°F). Expect cool days with a minimum of -1°C (31°F) and a pleasant maximum of 19°C (66°F). During this time, the region typically sees 88 mm (3.4 in) of precipitation spread over 13 days, contributing to an average humidity level of 89%.

September Temperature in Keminmaa

In September in Keminmaa, the average temperature is 10°C (50°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -1°C (31°F). Be sure to pack accordingly, as this month offers a mix of mild and chilly days perfect for layering your travel outfits.

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

The chart illustrates September temperature patterns in Keminmaa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keminmaa, September typically has an average temperature of 10°C (50°F), with highs reaching up to 19°C (66°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in Keminmaa

In Keminmaa in September, the precipitation amount is 88 mm (3.4 in) occurring over 13 days.

September Precipitation Trends in Keminmaa

The chart displays monthly precipitation patterns in Keminmaa, 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 Keminmaa, September typically receives around 88 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 Keminmaa

In Keminmaa in September, humidity is 89%. With an average temperature of 10°C (50°F), this humidity feels like a dense blanket wrapping around you, making travel feel damp and chilly, and urging you to dress in layers for comfort.

September Average Humidity in Keminmaa

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

In Keminmaa 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 Keminmaa, you can check the information here.

Maximum UV Index Levels in Keminmaa for September

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

Data source: Keminmaa 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 Keminmaa Compares to Other Months

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

This table compares monthly weather conditions in Keminmaa, 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)	50 mm (2.0 inches)	99%	low
February Weather	-9°C (17°F)	48 mm (1.9 inches)	97%	low
March Weather	-5°C (24°F)	50 mm (2.0 inches)	93%	low
April Weather	-1°C (31°F)	38 mm (1.5 inches)	86%	moderate
May Weather	5°C (42°F)	52 mm (2.1 inches)	80%	moderate
June Weather	13°C (55°F)	59 mm (2.3 inches)	76%	high
July Weather	17°C (62°F)	63 mm (2.5 inches)	79%	high
August Weather	15°C (59°F)	92 mm (3.6 inches)	83%	moderate
September Weather	10°C (50°F)	88 mm (3.4 inches)	89%	moderate
October Weather	4°C (40°F)	106 mm (4.2 inches)	94%	low
November Weather	0°C (32°F)	82 mm (3.2 inches)	94%	low
December Weather	-4°C (25°F)	71 mm (2.8 inches)	98%	low