September Weather in Kerava, Finland

Last updated: August 23, 2025

In September, the average temperature in Kerava, Finland hovers around 11°C (53°F). Temperatures can vary, with a minimum drop to -2°C (28°F) and a maximum rise to 24°C (75°F). Expect 66 mm (2.6 in) of precipitation over about 12 days, contributing to a high average humidity of 90%. Whether you're exploring or relaxing indoors, be prepared for the dynamic weather this month!

September Temperature in Kerava

In September in Kerava, the average temperature is 11°C (53°F). The maximum can reach 24°C (75°F) and the minimum can be as low as -2°C (28°F). It's a perfect time for travelers to prepare for mild weather with some chilly evenings, making layers essential for comfort.

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

The chart illustrates September temperature patterns in Kerava, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kerava, September typically has an average temperature of 11°C (53°F), with highs reaching up to 24°C (75°F) and lows dropping to around -2°C (28°F).

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

September Precipitation in Kerava

In Kerava in September, the precipitation amount is 66 mm (2.6 in) over the course of 12 days.

September Precipitation Trends in Kerava

The chart displays monthly precipitation patterns in Kerava, 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 Kerava, September typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Kerava

In Kerava in September, humidity is 90%. With an average temperature of 11°C (53°F), this humidity feels like a heavy cloak, making traveling feel sticky and exhausting, as the dampness clings to your skin and the chill in the air sharpens the discomfort, leaving you longing for a breath of fresh, dry air.

September Average Humidity in Kerava

This chart illustrates the average monthly humidity levels in Kerava, 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 Kerava is approximately 90%, 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 Kerava

In Kerava 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 Kerava for better planning.

Maximum UV Index Levels in Kerava for September

The chart shows the monthly maximum UV Index (UVI) for Kerava 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 Kerava typically reaches 4, which falls under the moderate exposure category.

Data source: Kerava 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 Kerava Compares to Other Months

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

This table compares monthly weather conditions in Kerava, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	52 mm (2.1 inches)	97%	low
February Weather	-4°C (25°F)	46 mm (1.8 inches)	95%	low
March Weather	-1°C (30°F)	49 mm (1.9 inches)	93%	moderate
April Weather	4°C (39°F)	46 mm (1.8 inches)	86%	moderate
May Weather	10°C (51°F)	55 mm (2.2 inches)	75%	moderate
June Weather	16°C (62°F)	61 mm (2.4 inches)	75%	high
July Weather	18°C (64°F)	82 mm (3.2 inches)	80%	high
August Weather	16°C (61°F)	75 mm (3.0 inches)	83%	moderate
September Weather	11°C (53°F)	66 mm (2.6 inches)	90%	moderate
October Weather	6°C (44°F)	81 mm (3.2 inches)	93%	low
November Weather	2°C (37°F)	54 mm (2.1 inches)	94%	low
December Weather	-2°C (29°F)	71 mm (2.8 inches)	95%	low