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September Weather in Virtasalmi, Finland

Last updated: August 23, 2025

In Virtasalmi, Finland, the average temperature in September hovers around 10°C (51°F). Expect daily variations, with minimums dipping to -1°C (30°F) and maximums peaking at 23°C (73°F). This month brings moderate rainfall, with 76 mm (3.0 in) spread over 13 days and an average humidity level of 91%, making for a refreshing yet wet atmosphere.

September Temperature in Virtasalmi

In September in Virtasalmi, the average temperature is 10°C (51°F), with maximums reaching up to 23°C (73°F) and minimums dropping as low as -1°C (30°F). This makes it a great time for travelers to experience a pleasant mix of mild days and cool evenings.

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

The chart illustrates September temperature patterns in Virtasalmi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Virtasalmi, September typically has an average temperature of 10°C (51°F), with highs reaching up to 23°C (73°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec222127364860636050413426
Data source: Temperature data for Virtasalmi 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 Virtasalmi

In Virtasalmi in September, the total precipitation amount is 76 mm (3.0 in), which occurs over the course of 13 days.

September Precipitation Trends in Virtasalmi

The chart displays monthly precipitation patterns in Virtasalmi, 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 Virtasalmi, September typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec494244455864858476736267
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Virtasalmi

In Virtasalmi in September, humidity is 91%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration uncomfortable and leaving you yearning for warm, dry shelter.

September Average Humidity in Virtasalmi

This chart illustrates the average monthly humidity levels in Virtasalmi, 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 Virtasalmi is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec99%97%95%87%78%74%80%85%91%95%94%98%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Virtasalmi

In Virtasalmi 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 Virtasalmi, you can check the information here.

Maximum UV Index Levels in Virtasalmi for September

The chart shows the monthly maximum UV Index (UVI) for Virtasalmi 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 Virtasalmi typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456653211
Data source: Virtasalmi 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 Virtasalmi Compares to Other Months

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

This table compares monthly weather conditions in Virtasalmi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)49 mm (1.9 inches)99%low
February Weather-6°C (21°F)42 mm (1.7 inches)97%low
March Weather-3°C (27°F)44 mm (1.7 inches)95%moderate
April Weather2°C (36°F)45 mm (1.8 inches)87%moderate
May Weather9°C (49°F)58 mm (2.3 inches)78%moderate
June Weather16°C (61°F)64 mm (2.5 inches)74%high
July Weather17°C (63°F)85 mm (3.4 inches)80%high
August Weather15°C (60°F)84 mm (3.3 inches)85%moderate
September Weather10°C (51°F)76 mm (3.0 inches)91%moderate
October Weather5°C (42°F)73 mm (2.9 inches)95%low
November Weather1°C (34°F)62 mm (2.5 inches)94%low
December Weather-4°C (26°F)67 mm (2.6 inches)98%low

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