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September Weather in Pernioe, Finland

Last updated: August 23, 2025

In September, the average temperature in Pernioe, Finland is a mild 12°C (54°F), but be prepared for a range that can dip as low as -2°C (30°F) and soar up to 23°C (73°F). With 64 mm (2.5 in) of precipitation spread across 13 days, it’s wise to bring an umbrella. Humidity levels are high, averaging 90%, creating a lush, vibrant atmosphere.

September Temperature in Pernioe

In September in Pernioe, the average temperature is 12°C (54°F). Maximums can reach 23°C (73°F), while minimums can drop as low as -2°C (30°F). It's advisable to pack layers to stay comfortable during your travels, as temperatures can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Pernioe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pernioe, September typically has an average temperature of 12°C (54°F), with highs reaching up to 23°C (73°F) and lows dropping to around -2°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec282631395061646254453831
Data source: Temperature data for Pernioe 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 Pernioe

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

September Precipitation Trends in Pernioe

The chart displays monthly precipitation patterns in Pernioe, 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 Pernioe, September typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec544650385150819764846072
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Pernioe

In Pernioe 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 Pernioe

This chart illustrates the average monthly humidity levels in Pernioe, 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 Pernioe is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec97%95%93%87%75%75%80%83%90%93%94%95%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Pernioe

In Pernioe 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 Pernioe for better planning.

Maximum UV Index Levels in Pernioe for September

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

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

This table compares monthly weather conditions in Pernioe, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)54 mm (2.1 inches)97%low
February Weather-3°C (26°F)46 mm (1.8 inches)95%low
March Weather-1°C (31°F)50 mm (2.0 inches)93%moderate
April Weather4°C (39°F)37 mm (1.5 inches)86%moderate
May Weather10°C (50°F)51 mm (2.0 inches)75%moderate
June Weather16°C (61°F)50 mm (2.0 inches)75%high
July Weather18°C (65°F)81 mm (3.2 inches)80%high
August Weather17°C (62°F)97 mm (3.8 inches)83%moderate
September Weather12°C (54°F)64 mm (2.5 inches)90%moderate
October Weather7°C (45°F)84 mm (3.3 inches)93%low
November Weather3°C (38°F)60 mm (2.4 inches)94%low
December Weather-1°C (31°F)72 mm (2.8 inches)95%low

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