September Weather in Raahe, Finland

Last updated: August 23, 2025

In September, the average temperature in Raahe, Finland hovers around 11°C (52°F), with a minimum of 3°C (37°F) and a pleasant maximum of 20°C (69°F). Expect around 83 mm (3.3 in) of precipitation spread over 13 days, contributing to an average humidity level of 89%. Stay prepared for a mix of cool and damp weather!

September Temperature in Raahe

In September in Raahe, the average temperature is 11°C (52°F), with maximums reaching 20°C (69°F) and minimums dropping as low as 3°C (37°F). It's a great time to explore Raahe, but be sure to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Raahe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Raahe, September typically has an average temperature of 11°C (52°F), with highs reaching up to 20°C (69°F) and lows dropping to around 3°C (37°F).

Data source: Temperature data for Raahe generated using information from the Copernicus Climate Change Service.

September Precipitation in Raahe

In Raahe in September, the precipitation amount is 83 mm (3.3 in) over a span of 13 days.

September Precipitation Trends in Raahe

The chart displays monthly precipitation patterns in Raahe, 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 Raahe, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Raahe

In Raahe in September humidity is 89%. With an average temperature of 11°C (52°F), this humidity feels like a cool mist clinging to your skin, making outdoor activities feel damp and chilly, so it's essential to dress in layers and be prepared for a brisk experience while traveling.

September Average Humidity in Raahe

This chart illustrates the average monthly humidity levels in Raahe, 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 Raahe is approximately 89%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Raahe

In Raahe 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 Raahe, you can check the information here.

Maximum UV Index Levels in Raahe for September

The chart shows the monthly maximum UV Index (UVI) for Raahe 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 Raahe typically reaches 3, which falls under the moderate exposure category.

Data source: Raahe 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 Raahe Compares to Other Months

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

This table compares monthly weather conditions in Raahe, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	38 mm (1.5 inches)	99%	low
February Weather	-7°C (20°F)	38 mm (1.5 inches)	97%	low
March Weather	-4°C (25°F)	37 mm (1.5 inches)	93%	moderate
April Weather	0°C (31°F)	38 mm (1.5 inches)	86%	moderate
May Weather	5°C (42°F)	56 mm (2.2 inches)	80%	moderate
June Weather	13°C (55°F)	50 mm (2.0 inches)	76%	high
July Weather	17°C (62°F)	64 mm (2.5 inches)	79%	high
August Weather	15°C (59°F)	91 mm (3.6 inches)	83%	moderate
September Weather	11°C (52°F)	83 mm (3.3 inches)	89%	moderate
October Weather	5°C (42°F)	99 mm (3.9 inches)	94%	low
November Weather	1°C (35°F)	70 mm (2.7 inches)	94%	low
December Weather	-2°C (28°F)	55 mm (2.2 inches)	98%	low