September Weather in Kiiu, Estonia

Last updated: August 23, 2025

In September, the average temperature in Kiiu, Estonia hovers around 13°C (55°F), with a temperature range that can dip to a chilly 2°C (36°F) and soar to a pleasant 24°C (75°F). Be prepared for some rainfall, as the area experiences an average precipitation of 81 mm (3.2 in) over about 15 days. Don't forget your umbrella, as the average humidity levels can reach a high 89%!

September Temperature in Kiiu

In September in Kiiu, the average temperature is 13°C (55°F). The maximum can reach 24°C (75°F), and the minimum can be as low as 2°C (36°F). Packing layers would be ideal for travelers, as you can experience both warm and cool temperatures throughout the day.

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

The chart illustrates September temperature patterns in Kiiu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kiiu, September typically has an average temperature of 13°C (55°F), with highs reaching up to 24°C (75°F) and lows dropping to around 2°C (36°F).

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

September Precipitation in Kiiu

In Kiiu in September, the precipitation amount is 81 mm (3.2 in) spread over the course of 15 days.

September Precipitation Trends in Kiiu

The chart displays monthly precipitation patterns in Kiiu, 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 Kiiu, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 15 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 Kiiu

In Kiiu in September humidity is 89%. With an average temperature of 13°C (55°F), this humidity feels like a thick, damp blanket enveloping you, making every step feel heavier and each breath a bit more laborious for traveling.

September Average Humidity in Kiiu

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

In Kiiu 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 Kiiu for better planning.

Maximum UV Index Levels in Kiiu for September

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

Data source: Kiiu 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 Kiiu Compares to Other Months

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

This table compares monthly weather conditions in Kiiu, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	43 mm (1.7 inches)	95%	low
February Weather	-2°C (28°F)	48 mm (1.9 inches)	93%	low
March Weather	0°C (32°F)	46 mm (1.8 inches)	90%	moderate
April Weather	4°C (40°F)	46 mm (1.8 inches)	87%	moderate
May Weather	10°C (49°F)	55 mm (2.2 inches)	73%	moderate
June Weather	16°C (60°F)	57 mm (2.2 inches)	77%	high
July Weather	18°C (64°F)	73 mm (2.9 inches)	80%	high
August Weather	17°C (62°F)	100 mm (4.0 inches)	84%	moderate
September Weather	13°C (55°F)	81 mm (3.2 inches)	89%	moderate
October Weather	8°C (46°F)	97 mm (3.8 inches)	92%	low
November Weather	4°C (39°F)	59 mm (2.3 inches)	93%	low
December Weather	-1°C (31°F)	59 mm (2.3 inches)	93%	low