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September Weather in Halsua, Finland

Last updated: August 23, 2025

In September, the average temperature in Halsua, Finland hovers around 9°C (49°F). Expect a wide temperature range, with minimums dipping to -5°C (23°F) and maximums rising to 23°C (74°F). There’s a fair chance of rain, with 77 mm (3.0 in) of precipitation over approximately 14 days, contributing to an average humidity of 89%.

September Temperature in Halsua

In September in Halsua, the average temperature is 9°C (49°F), with maximums reaching up to 23°C (74°F) and minimums dropping as low as -5°C (23°F). This range of temperatures makes it essential for travelers to prepare for both warm and chilly conditions.

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

The chart illustrates September temperature patterns in Halsua, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Halsua, September typically has an average temperature of 9°C (49°F), with highs reaching up to 23°C (74°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec212027364759625849393225
Data source: Temperature data for Halsua 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 Halsua

In Halsua in September, the precipitation amount is 77 mm (3.0 in) over the course of 14 days.

September Precipitation Trends in Halsua

The chart displays monthly precipitation patterns in Halsua, 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 Halsua, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec394140446357729477886149
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Halsua

In Halsua in September, humidity is 89%. With an average temperature of 9°C (49°F), this humidity feels like a persistent dampness that clings to your clothes and skin, making it challenging to stay comfortable while traveling.

September Average Humidity in Halsua

This chart illustrates the average monthly humidity levels in Halsua, 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 Halsua 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 Halsua

In Halsua 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 Halsua, you can check the information here.

Maximum UV Index Levels in Halsua for September

The chart shows the monthly maximum UV Index (UVI) for Halsua 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 Halsua typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec112456653211
Data source: Halsua 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 Halsua Compares to Other Months

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

This table compares monthly weather conditions in Halsua, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)39 mm (1.5 inches)97%low
February Weather-7°C (20°F)41 mm (1.6 inches)95%low
March Weather-3°C (27°F)40 mm (1.6 inches)92%low
April Weather2°C (36°F)44 mm (1.7 inches)85%moderate
May Weather8°C (47°F)63 mm (2.5 inches)77%moderate
June Weather15°C (59°F)57 mm (2.2 inches)74%high
July Weather16°C (62°F)72 mm (2.8 inches)79%high
August Weather14°C (58°F)94 mm (3.7 inches)82%moderate
September Weather9°C (49°F)77 mm (3.0 inches)89%moderate
October Weather4°C (40°F)88 mm (3.5 inches)93%low
November Weather0°C (32°F)61 mm (2.4 inches)93%low
December Weather-4°C (26°F)49 mm (1.9 inches)95%low

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