September Weather in Keuruu, Finland

Last updated: August 23, 2025

In September, the average temperature in Keuruu, Finland hovers around 10°C (50°F). Expect a wide range with minimum temperatures dipping to -3°C (27°F) and peaking at 22°C (72°F). During this month, anticipate approximately 72 mm (2.8 in) of precipitation spread over 12 days, alongside a high average humidity of 89%.

September Temperature in Keuruu

In September in Keuruu, the average temperature is 10°C (50°F). Maximums can reach 22°C (72°F) and minimums can be as low as -3°C (27°F). Be prepared for a range of temperatures during your travels, from mild to quite chilly.

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

The chart illustrates September temperature patterns in Keuruu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keuruu, 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 -3°C (27°F).

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

September Precipitation in Keuruu

In Keuruu in September, the total precipitation amount is 72 mm (2.8 in) over the course of 12 days.

September Precipitation Trends in Keuruu

The chart displays monthly precipitation patterns in Keuruu, 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 Keuruu, September typically receives around 72 mm (2.8 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 Keuruu

In Keuruu 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 Keuruu

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

In Keuruu 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 Keuruu, you can check the information here.

Maximum UV Index Levels in Keuruu for September

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

Data source: Keuruu 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 Keuruu Compares to Other Months

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

This table compares monthly weather conditions in Keuruu, 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)	46 mm (1.8 inches)	97%	low
February Weather	-6°C (21°F)	44 mm (1.7 inches)	95%	low
March Weather	-2°C (28°F)	43 mm (1.7 inches)	92%	moderate
April Weather	2°C (36°F)	44 mm (1.7 inches)	85%	moderate
May Weather	9°C (48°F)	60 mm (2.4 inches)	77%	moderate
June Weather	16°C (60°F)	56 mm (2.2 inches)	74%	high
July Weather	17°C (63°F)	65 mm (2.6 inches)	79%	high
August Weather	15°C (59°F)	90 mm (3.6 inches)	82%	moderate
September Weather	10°C (50°F)	72 mm (2.8 inches)	89%	moderate
October Weather	5°C (41°F)	78 mm (3.1 inches)	93%	low
November Weather	1°C (34°F)	66 mm (2.6 inches)	93%	low
December Weather	-3°C (27°F)	68 mm (2.7 inches)	95%	low