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September Weather in Virolahti, Finland

Last updated: August 23, 2025

In September, the average temperature in Virolahti, Finland hovers around 12°C (54°F), with a minimum that can dip to 0°C (33°F) and a maximum reaching up to 22°C (72°F). You'll experience a fair amount of precipitation, totaling 69 mm (2.7 in) over the course of 12 days. Be prepared for the moist atmosphere, as the average humidity sits at a notable 90%.

September Temperature in Virolahti

In September in Virolahti, the average temperature is 12°C (54°F). Maximum temperatures can reach 22°C (72°F), while minimums can drop as low as 0°C (33°F). This makes Virolahti a pleasant destination for travelers seeking a mild climate during this time of year.

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

The chart illustrates September temperature patterns in Virolahti, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Virolahti, September typically has an average temperature of 12°C (54°F), with highs reaching up to 22°C (72°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec272529384961656254453830
Data source: Temperature data for Virolahti generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Virolahti

In Virolahti in September, the precipitation amount is 69 mm (2.7 in) over the span of 12 days.

September Precipitation Trends in Virolahti

The chart displays monthly precipitation patterns in Virolahti, 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 Virolahti, September typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec535649434644669369856481
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Virolahti

In Virolahti in September, humidity is 90%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and traveling a bit more draining than usual.

September Average Humidity in Virolahti

This chart illustrates the average monthly humidity levels in Virolahti, 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 Virolahti is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%96%93%88%77%76%82%84%90%93%93%95%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Virolahti

In Virolahti in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Virolahti for better planning.

Maximum UV Index Levels in Virolahti for September

The chart shows the monthly maximum UV Index (UVI) for Virolahti 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 Virolahti typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457754211
Data source: Virolahti 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 Virolahti Compares to Other Months

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

This table compares monthly weather conditions in Virolahti, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)53 mm (2.1 inches)98%low
February Weather-4°C (25°F)56 mm (2.2 inches)96%low
March Weather-1°C (30°F)49 mm (1.9 inches)93%moderate
April Weather3°C (38°F)43 mm (1.7 inches)88%moderate
May Weather10°C (50°F)46 mm (1.8 inches)77%moderate
June Weather16°C (61°F)44 mm (1.7 inches)75%high
July Weather18°C (65°F)66 mm (2.6 inches)82%high
August Weather17°C (62°F)93 mm (3.7 inches)84%moderate
September Weather12°C (54°F)69 mm (2.7 inches)90%moderate
October Weather7°C (45°F)85 mm (3.3 inches)93%low
November Weather3°C (38°F)64 mm (2.5 inches)93%low
December Weather-1°C (30°F)81 mm (3.2 inches)95%low

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