September Weather in Nilsiae, Finland

Last updated: August 23, 2025

In September, the average temperature in Nilsiae, Finland hovers around 10°C (49°F). Expect a chilly minimum of -3°C (27°F), while the mercury can rise to a pleasant 23°C (74°F). With 89 mm (3.5 in) of precipitation spread over 13 days, it's wise to prepare for some rain. The average humidity is a high 92%, making the air feel quite damp.

September Temperature in Nilsiae

In September in Nilsiae, 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 Nilsiae: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Nilsiae, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nilsiae, 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 Nilsiae generated using information from the Copernicus Climate Change Service.

September Precipitation in Nilsiae

In Nilsiae in September, the precipitation amount is 89 mm (3.5 in) distributed over 13 days.

September Precipitation Trends in Nilsiae

The chart displays monthly precipitation patterns in Nilsiae, 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 Nilsiae, September typically receives around 89 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.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Nilsiae

In Nilsiae in September humidity is 92%. With an average temperature of 10°C (49°F), this humidity feels like a damp blanket wrapping you up, making traveling quite uncomfortable as you may struggle to dry off and feel fresh while exploring.

September Average Humidity in Nilsiae

This chart illustrates the average monthly humidity levels in Nilsiae, 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 Nilsiae is approximately 92%, 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 Nilsiae

In Nilsiae 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 Nilsiae, you can check the information here.

Maximum UV Index Levels in Nilsiae for September

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

Data source: Nilsiae 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 Nilsiae Compares to Other Months

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

This table compares monthly weather conditions in Nilsiae, 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	-8°C (19°F)	45 mm (1.8 inches)	98%	low
March Weather	-4°C (26°F)	45 mm (1.8 inches)	95%	moderate
April Weather	1°C (35°F)	44 mm (1.7 inches)	87%	moderate
May Weather	8°C (47°F)	55 mm (2.2 inches)	78%	moderate
June Weather	15°C (60°F)	69 mm (2.7 inches)	75%	high
July Weather	17°C (63°F)	83 mm (3.2 inches)	83%	high
August Weather	15°C (59°F)	103 mm (4.0 inches)	88%	moderate
September Weather	10°C (49°F)	89 mm (3.5 inches)	92%	moderate
October Weather	5°C (40°F)	90 mm (3.6 inches)	95%	low
November Weather	0°C (32°F)	80 mm (3.2 inches)	94%	low
December Weather	-4°C (24°F)	70 mm (2.7 inches)	98%	low