September Weather in Jaemsae, Finland

Last updated: August 23, 2025

In September, the average temperature in Jaemsae, Finland is a mild 11°C (52°F). However, be prepared for a range, as temperatures can dip to a cool -1°C (30°F) or rise to a pleasant 22°C (72°F). Expect 72 mm (2.8 in) of precipitation spread over 13 days, contributing to a high average humidity of 90%.

September Temperature in Jaemsae

In September in Jaemsae, the average temperature is 11°C (52°F). Maximums can reach 22°C (72°F), and minimums can be as low as -1°C (30°F). It's advisable to pack layers to accommodate the varying temperatures during your travels.

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

The chart illustrates September temperature patterns in Jaemsae, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jaemsae, September typically has an average temperature of 11°C (52°F), with highs reaching up to 22°C (72°F) and lows dropping to around -1°C (30°F).

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

September Precipitation in Jaemsae

In Jaemsae in September, the precipitation amount is 72 mm (2.8 in) over a period of 13 days.

September Precipitation Trends in Jaemsae

The chart displays monthly precipitation patterns in Jaemsae, 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 Jaemsae, September typically receives around 72 mm (2.8 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 Jaemsae

In Jaemsae in September, humidity is 90%. With an average temperature of 11°C (52°F), this humidity feels like a heavy blanket that clings to your skin, making travel uncomfortable and muggy.

September Average Humidity in Jaemsae

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

In Jaemsae 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 Jaemsae, you can check the information here.

Maximum UV Index Levels in Jaemsae for September

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

Data source: Jaemsae 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 Jaemsae Compares to Other Months

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

This table compares monthly weather conditions in Jaemsae, 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 (24°F)	47 mm (1.8 inches)	98%	low
February Weather	-6°C (22°F)	42 mm (1.7 inches)	96%	low
March Weather	-2°C (28°F)	41 mm (1.6 inches)	93%	moderate
April Weather	3°C (37°F)	42 mm (1.7 inches)	87%	moderate
May Weather	9°C (49°F)	57 mm (2.2 inches)	75%	moderate
June Weather	16°C (61°F)	60 mm (2.4 inches)	74%	high
July Weather	17°C (64°F)	71 mm (2.8 inches)	80%	high
August Weather	16°C (60°F)	92 mm (3.6 inches)	85%	moderate
September Weather	11°C (52°F)	72 mm (2.8 inches)	90%	moderate
October Weather	6°C (43°F)	82 mm (3.2 inches)	94%	low
November Weather	2°C (36°F)	59 mm (2.3 inches)	94%	low
December Weather	-2°C (28°F)	69 mm (2.7 inches)	96%	low