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September Weather in Hollola, Finland

Last updated: August 23, 2025

In September, the average temperature in Hollola, Finland hovers around 11°C (52°F), with a minimum dipping to -2°C (29°F) and a pleasant maximum of 23°C (74°F). Visitors can expect an average precipitation of 65 mm (2.6 in) spread over 12 days, contributing to the overall 90% humidity that defines the atmosphere of this charming destination.

September Temperature in Hollola

In September in Hollola, the average temperature is 11°C (52°F). The maximum can reach 23°C (74°F) and the minimum can be as low as -2°C (29°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates September temperature patterns in Hollola, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hollola, September typically has an average temperature of 11°C (52°F), with highs reaching up to 23°C (74°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec252329385061636052433628
Data source: Temperature data for Hollola 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 Hollola

In Hollola in September, the precipitation amount is 65 mm (2.6 in) over the course of 12 days.

September Precipitation Trends in Hollola

The chart displays monthly precipitation patterns in Hollola, 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 Hollola, September typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec494445475664808265795470
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Hollola

In Hollola 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 Hollola

This chart illustrates the average monthly humidity levels in Hollola, 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 Hollola is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%96%93%87%75%74%80%85%90%94%94%96%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Hollola

In Hollola 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 Hollola, you can check the information here.

Maximum UV Index Levels in Hollola for September

The chart shows the monthly maximum UV Index (UVI) for Hollola 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 Hollola typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456753211
Data source: Hollola 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 Hollola Compares to Other Months

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

This table compares monthly weather conditions in Hollola, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)49 mm (1.9 inches)98%low
February Weather-5°C (24°F)44 mm (1.7 inches)96%low
March Weather-2°C (29°F)45 mm (1.8 inches)93%moderate
April Weather3°C (38°F)47 mm (1.9 inches)87%moderate
May Weather10°C (50°F)56 mm (2.2 inches)75%moderate
June Weather16°C (61°F)64 mm (2.5 inches)74%high
July Weather17°C (64°F)80 mm (3.1 inches)80%high
August Weather16°C (61°F)81 mm (3.2 inches)85%moderate
September Weather11°C (52°F)65 mm (2.6 inches)90%moderate
October Weather6°C (43°F)79 mm (3.1 inches)94%low
November Weather2°C (36°F)54 mm (2.1 inches)94%low
December Weather-2°C (28°F)70 mm (2.8 inches)96%low

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