September Weather in Koeru, Estonia

Last updated: August 23, 2025

In Koeru, Estonia, the average temperature in September hovers around 12°C (54°F), with a minimum dipping to -1°C (31°F) and a maximum peaking at 25°C (77°F). Expect 69 mm (2.7 in) of precipitation spread over 12 days, along with a high average humidity of 89% that adds to the region's unique climate experience.

September Temperature in Koeru

In September in Koeru, the average temperature is 12°C (54°F). Maximum temperatures can reach 25°C (77°F), while the minimum can drop as low as -1°C (31°F). Travelers should prepare for a wide range of temperatures when visiting during this time.

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

The chart illustrates September temperature patterns in Koeru, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koeru, September typically has an average temperature of 12°C (54°F), with highs reaching up to 25°C (77°F) and lows dropping to around -1°C (31°F).

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

September Precipitation in Koeru

In Koeru in September, the precipitation amount is 69 mm (2.7 in) over the span of 12 days.

September Precipitation Trends in Koeru

The chart displays monthly precipitation patterns in Koeru, 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 Koeru, September typically receives around 69 mm (2.7 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 Koeru

In Koeru in September humidity is 89%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that envelops you, making travels slightly uncomfortable as you navigate through a thick, moist air that can cling to your skin and steal your warmth.

September Average Humidity in Koeru

This chart illustrates the average monthly humidity levels in Koeru, 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 Koeru is approximately 89%, 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 Koeru

In Koeru 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 Koeru for better planning.

Maximum UV Index Levels in Koeru for September

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

Data source: Koeru 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 Koeru Compares to Other Months

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

This table compares monthly weather conditions in Koeru, 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 (27°F)	42 mm (1.7 inches)	95%	low
February Weather	-3°C (26°F)	46 mm (1.8 inches)	93%	low
March Weather	-1°C (31°F)	49 mm (1.9 inches)	90%	moderate
April Weather	4°C (40°F)	47 mm (1.8 inches)	87%	moderate
May Weather	10°C (51°F)	52 mm (2.1 inches)	73%	moderate
June Weather	16°C (61°F)	66 mm (2.6 inches)	77%	high
July Weather	17°C (64°F)	71 mm (2.8 inches)	80%	high
August Weather	16°C (61°F)	99 mm (3.9 inches)	84%	high
September Weather	12°C (54°F)	69 mm (2.7 inches)	89%	moderate
October Weather	7°C (45°F)	81 mm (3.2 inches)	92%	low
November Weather	3°C (37°F)	55 mm (2.2 inches)	93%	low
December Weather	-2°C (29°F)	59 mm (2.3 inches)	93%	low