nomadseason

September Weather in Lohja, Finland

Last updated: August 23, 2025

In September, the average temperature in Lohja, Finland hovers around 12°C (54°F), with a minimum of -1°C (30°F) and a pleasant maximum of 22°C (73°F). Expect around 63 mm (2.5 in) of precipitation spread across 13 days, contributing to an average humidity level of a high 90%. Stay prepared for varied weather as you explore this captivating destination!

September Temperature in Lohja

In September in Lohja, the average temperature is 12°C (54°F). The maximum can reach 22°C (73°F), while the minimum can drop to as low as -1°C (30°F). This climate makes it essential for travelers to pack layers and be prepared for varying weather conditions.

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

The chart illustrates September temperature patterns in Lohja, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lohja, September typically has an average temperature of 12°C (54°F), with highs reaching up to 22°C (73°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec282630384961646254453831
Data source: Temperature data for Lohja generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Lohja

In Lohja in September, the precipitation amount is 63 mm (2.5 in) spread over 13 days.

September Precipitation Trends in Lohja

The chart displays monthly precipitation patterns in Lohja, 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 Lohja, September typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec584953375251848263896274
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Lohja

In Lohja in September, humidity is 90%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and traveling a bit more draining than usual.

September Average Humidity in Lohja

This chart illustrates the average monthly humidity levels in Lohja, 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 Lohja is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec97%95%93%87%75%75%80%83%90%93%94%95%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Lohja

In Lohja in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Lohja for better planning.

Maximum UV Index Levels in Lohja for September

The chart shows the monthly maximum UV Index (UVI) for Lohja 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 Lohja typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Lohja 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 Lohja Compares to Other Months

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

This table compares monthly weather conditions in Lohja, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)57 mm (2.3 inches)97%low
February Weather-3°C (26°F)49 mm (1.9 inches)95%low
March Weather-1°C (31°F)53 mm (2.1 inches)93%moderate
April Weather3°C (39°F)37 mm (1.5 inches)86%moderate
May Weather10°C (50°F)52 mm (2.0 inches)75%moderate
June Weather16°C (61°F)51 mm (2.0 inches)75%high
July Weather18°C (64°F)84 mm (3.3 inches)80%high
August Weather16°C (62°F)82 mm (3.2 inches)83%moderate
September Weather12°C (54°F)63 mm (2.5 inches)90%moderate
October Weather7°C (45°F)89 mm (3.5 inches)93%low
November Weather3°C (38°F)62 mm (2.5 inches)94%low
December Weather-1°C (31°F)74 mm (2.9 inches)95%low

Compare Lohja's Climate with Cities Worldwide