September Weather in Renko, Finland

Last updated: August 23, 2025

In September, the average temperature in Renko, Finland hovers around 11°C (52°F). You might experience a chilly minimum of -2°C (29°F), but highs can reach a pleasant 23°C (74°F). Expect precipitation of 64 mm (2.5 in) over approximately 13 days, combined with a high average humidity of 90%, making it essential to pack accordingly!

September Temperature in Renko

In September in Renko, the average temperature is 11°C (52°F). The maximum can reach 23°C (74°F) and the minimum can be as low as -2°C (29°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates September temperature patterns in Renko, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Renko, September typically has an average temperature of 11°C (52°F), with highs reaching up to 23°C (74°F) and lows dropping to around -2°C (29°F).

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

September Precipitation in Renko

In Renko in September, the precipitation amount is 64 mm (2.5 in) spread over 13 days.

September Precipitation Trends in Renko

The chart displays monthly precipitation patterns in Renko, 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 Renko, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Renko

In Renko in September, humidity is 90%. With an average temperature of 11°C (52°F), this humidity feels like a heavy blanket that clings to your skin, making travel uncomfortable and muggy.

September Average Humidity in Renko

This chart illustrates the average monthly humidity levels in Renko, 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 Renko is approximately 90%, 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 Renko

In Renko 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 Renko, you can check the information here.

Maximum UV Index Levels in Renko for September

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

Data source: Renko 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 Renko Compares to Other Months

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

This table compares monthly weather conditions in Renko, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	48 mm (1.9 inches)	97%	low
February Weather	-5°C (24°F)	41 mm (1.6 inches)	95%	low
March Weather	-2°C (30°F)	42 mm (1.7 inches)	93%	moderate
April Weather	3°C (38°F)	45 mm (1.8 inches)	86%	moderate
May Weather	10°C (50°F)	59 mm (2.3 inches)	75%	moderate
June Weather	16°C (61°F)	69 mm (2.7 inches)	75%	high
July Weather	17°C (63°F)	84 mm (3.3 inches)	80%	high
August Weather	16°C (61°F)	80 mm (3.2 inches)	83%	moderate
September Weather	11°C (52°F)	64 mm (2.5 inches)	90%	moderate
October Weather	6°C (43°F)	75 mm (2.9 inches)	93%	low
November Weather	2°C (36°F)	52 mm (2.0 inches)	94%	low
December Weather	-2°C (29°F)	62 mm (2.4 inches)	95%	low