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September Weather in Purmo, Finland

Last updated: August 23, 2025

In September, the average temperature in Purmo, Finland hovers around 10°C (51°F). Expect lows of -2°C (29°F) and highs reaching 23°C (74°F). With an average humidity of 89%, you'll find the air quite damp, complemented by approximately 72 mm (2.8 in) of precipitation over 13 days.

September Temperature in Purmo

In September in Purmo, the average temperature is 10°C (51°F). Maximums can reach 23°C (74°F), while minimums can drop as low as -2°C (29°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates September temperature patterns in Purmo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Purmo, September typically has an average temperature of 10°C (51°F), with highs reaching up to 23°C (74°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec242228364759625950413427
Data source: Temperature data for Purmo 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 Purmo

In Purmo in September, the precipitation amount is 72 mm (2.8 in) over a period of 13 days.

September Precipitation Trends in Purmo

The chart displays monthly precipitation patterns in Purmo, 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 Purmo, September typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec374041415355699372865747
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Purmo

In Purmo in September humidity is 89%. With an average temperature of 10°C (51°F), this humidity feels like traveling through a thick fog, where the damp air clings to your skin, making the coolness feel even chillier and adding an element of discomfort to your adventures.

September Average Humidity in Purmo

This chart illustrates the average monthly humidity levels in Purmo, 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 Purmo is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec97%95%92%85%77%74%79%82%89%93%93%95%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Purmo

In Purmo 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 Purmo, you can check the information here.

Maximum UV Index Levels in Purmo for September

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

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

This table compares monthly weather conditions in Purmo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)37 mm (1.4 inches)97%low
February Weather-6°C (22°F)40 mm (1.6 inches)95%low
March Weather-2°C (28°F)41 mm (1.6 inches)92%moderate
April Weather2°C (37°F)41 mm (1.6 inches)85%moderate
May Weather8°C (47°F)53 mm (2.1 inches)77%moderate
June Weather15°C (59°F)55 mm (2.2 inches)74%high
July Weather17°C (63°F)69 mm (2.7 inches)79%high
August Weather15°C (59°F)93 mm (3.6 inches)82%moderate
September Weather10°C (51°F)72 mm (2.8 inches)89%moderate
October Weather5°C (42°F)86 mm (3.4 inches)93%low
November Weather1°C (34°F)57 mm (2.2 inches)93%low
December Weather-3°C (28°F)47 mm (1.8 inches)95%low

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