September Weather in Lapinlahti, Finland

Last updated: August 23, 2025

In Lapinlahti, Finland, the average temperature in September hovers around 10°C (49°F). Expect chilly nights with minimum temperatures dipping to a brisk -3°C (27°F), while days can warm up to a comfortable 23°C (74°F). Be prepared for 88 mm (3.5 in) of rain spread over 13 days, contributing to the region's high average humidity of 91%.

September Temperature in Lapinlahti

In September in Lapinlahti, the average temperature is 10°C (49°F). The maximum can reach 23°C (74°F), and the minimum can be as low as -3°C (27°F). Be prepared for varying weather conditions if you plan to travel during this time.

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

The chart illustrates September temperature patterns in Lapinlahti, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lapinlahti, September typically has an average temperature of 10°C (49°F), with highs reaching up to 23°C (74°F) and lows dropping to around -3°C (27°F).

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

September Precipitation in Lapinlahti

In Lapinlahti in September, the precipitation amount is 88 mm (3.5 in) spread over 13 days.

September Precipitation Trends in Lapinlahti

The chart displays monthly precipitation patterns in Lapinlahti, 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 Lapinlahti, September typically receives around 88 mm (3.5 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 Lapinlahti

In Lapinlahti in September, humidity is 91%. With an average temperature of 10°C (49°F), this humidity feels like a thick, damp blanket enveloping you, making travel quite uncomfortable and requiring frequent breaks to rest and rehydrate.

September Average Humidity in Lapinlahti

This chart illustrates the average monthly humidity levels in Lapinlahti, 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 Lapinlahti is approximately 91%, 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 Lapinlahti

In Lapinlahti 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 Lapinlahti, you can check the information here.

Maximum UV Index Levels in Lapinlahti for September

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

Data source: Lapinlahti 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 Lapinlahti Compares to Other Months

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

This table compares monthly weather conditions in Lapinlahti, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	49 mm (1.9 inches)	99%	low
February Weather	-7°C (19°F)	44 mm (1.7 inches)	97%	low
March Weather	-3°C (26°F)	43 mm (1.7 inches)	95%	moderate
April Weather	2°C (35°F)	45 mm (1.8 inches)	87%	moderate
May Weather	8°C (47°F)	54 mm (2.1 inches)	78%	moderate
June Weather	15°C (60°F)	69 mm (2.7 inches)	74%	high
July Weather	17°C (63°F)	88 mm (3.5 inches)	80%	high
August Weather	15°C (59°F)	100 mm (3.9 inches)	85%	moderate
September Weather	10°C (49°F)	88 mm (3.5 inches)	91%	moderate
October Weather	5°C (40°F)	87 mm (3.4 inches)	95%	low
November Weather	0°C (32°F)	79 mm (3.1 inches)	94%	low
December Weather	-4°C (25°F)	68 mm (2.7 inches)	98%	low