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October Weather in Harjavalta, Finland

Last updated: August 23, 2025

In Harjavalta, Finland, the average temperature in October hovers around 6°C (44°F). While you might experience a chilly minimum of -7°C (19°F), warmer days can peak at a pleasant 19°C (66°F). Expect around 75 mm (2.9 in) of precipitation over 14 days, coupled with a high humidity level of 90%, making for a notably damp atmosphere.

October Temperature in Harjavalta

In October in Harjavalta, the average temperature is 6°C (44°F). Maximum temperatures can reach 19°C (66°F), while minimum temperatures can drop as low as -7°C (19°F). Be prepared for a range of weather conditions when traveling to Harjavalta this month.

October Weather in Harjavalta: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Harjavalta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harjavalta, October typically has an average temperature of 6°C (44°F), with highs reaching up to 19°C (66°F) and lows dropping to around -7°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec272531395061646152433730
Data source: Temperature data for Harjavalta 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.

October Precipitation in Harjavalta

In Harjavalta in October, the total precipitation amount is 75 mm (2.9 in) accumulated over a period of 14 days.

October Precipitation Trends in Harjavalta

The chart displays monthly precipitation patterns in Harjavalta, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Harjavalta, October typically receives around 75 mm (2.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec434043384857909665755564
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Harjavalta

In Harjavalta in October humidity is 90%. With an average temperature of 6°C (44°F), this humidity feels like a damp chill that clings to your skin, making outdoor excursions uncomfortable and requiring extra layers to stay warm and dry while exploring.

October Average Humidity in Harjavalta

This chart illustrates the average monthly humidity levels in Harjavalta, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Harjavalta is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%89%85%77%78%78%79%86%90%91%89%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Harjavalta

In Harjavalta in October, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Harjavalta, you can visit Hourly UV Index in Harjavalta.

Maximum UV Index Levels in Harjavalta for October

The chart shows the monthly maximum UV Index (UVI) for Harjavalta in October, 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 October, the maximum UV index in Harjavalta typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456653211
Data source: Harjavalta October 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 October Weather in Harjavalta Compares to Other Months

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

This table compares monthly weather conditions in Harjavalta, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)43 mm (1.7 inches)92%low
February Weather-4°C (25°F)40 mm (1.6 inches)90%low
March Weather-1°C (31°F)43 mm (1.7 inches)89%moderate
April Weather4°C (40°F)38 mm (1.5 inches)85%moderate
May Weather10°C (50°F)47 mm (1.9 inches)77%moderate
June Weather16°C (61°F)57 mm (2.3 inches)78%high
July Weather18°C (64°F)90 mm (3.5 inches)78%high
August Weather16°C (61°F)96 mm (3.8 inches)79%moderate
September Weather11°C (53°F)65 mm (2.6 inches)86%moderate
October Weather6°C (44°F)75 mm (2.9 inches)90%low
November Weather3°C (37°F)55 mm (2.2 inches)91%low
December Weather-1°C (30°F)64 mm (2.5 inches)89%low

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