September Weather in Sahalahti, Finland

Last updated: August 23, 2025

In September, the average temperature in Sahalahti, Finland hovers around 11°C (52°F), offering a refreshing climate. You can expect temperatures to dip to a minimum of 0°C (32°F) and rise to a pleasant 22°C (72°F). This month also brings about 69 mm (2.7 in) of precipitation over approximately 14 days, resulting in a high humidity level of 90%—perfect for those who love a vibrant, lush environment!

September Temperature in Sahalahti

In September in Sahalahti, the average temperature is a mild 11°C (52°F). Maximum temperatures can reach a pleasant 22°C (72°F), while the minimum can dip as low as 0°C (32°F). This climate makes Sahalahti an ideal destination for travelers seeking a comfortable and varied weather experience.

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

The chart illustrates September temperature patterns in Sahalahti, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sahalahti, September typically has an average temperature of 11°C (52°F), with highs reaching up to 22°C (72°F) and lows dropping to around 0°C (32°F).

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

September Precipitation in Sahalahti

In Sahalahti in September, the precipitation amount is 69 mm (2.7 in) over the course of 14 days.

September Precipitation Trends in Sahalahti

The chart displays monthly precipitation patterns in Sahalahti, 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 Sahalahti, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 14 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 Sahalahti

In Sahalahti 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 Sahalahti

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

In Sahalahti 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 Sahalahti, you can check the information here.

Maximum UV Index Levels in Sahalahti for September

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

Data source: Sahalahti 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 Sahalahti Compares to Other Months

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

This table compares monthly weather conditions in Sahalahti, 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 (25°F)	47 mm (1.9 inches)	97%	low
February Weather	-5°C (23°F)	40 mm (1.6 inches)	95%	low
March Weather	-2°C (29°F)	42 mm (1.7 inches)	93%	moderate
April Weather	3°C (37°F)	42 mm (1.7 inches)	86%	moderate
May Weather	9°C (48°F)	58 mm (2.3 inches)	75%	moderate
June Weather	15°C (59°F)	68 mm (2.7 inches)	75%	high
July Weather	17°C (63°F)	76 mm (3.0 inches)	80%	high
August Weather	16°C (60°F)	85 mm (3.3 inches)	83%	moderate
September Weather	11°C (52°F)	69 mm (2.7 inches)	90%	moderate
October Weather	6°C (43°F)	82 mm (3.2 inches)	93%	low
November Weather	2°C (36°F)	58 mm (2.3 inches)	94%	low
December Weather	-2°C (29°F)	66 mm (2.6 inches)	95%	low