Last updated: August 23, 2025
In Kiili, Estonia, the average temperature for September hovers around 12°C (55°F), with daily fluctuations ranging from a chilly 1°C (33°F) to a warm 25°C (77°F). Expect 73 mm (2.9 in) of precipitation over approximately 14 days, contributing to an average humidity level of 87%. Whether you’re planning outdoor activities or cozy indoor retreats, be prepared for the variable weather of this season!
In September in Kiili, the average temperature is 12°C (55°F), with maximums reaching up to 25°C (77°F) and minimums dipping as low as 1°C (33°F). It's a perfect time to pack layers for your travels, as you can experience both warm afternoons and chilly evenings.
In Kiili in September, the total precipitation amount is 73 mm (2.9 in) over the course of 14 days.
In Kiili in September humidity is 87%. With an average temperature of 12°C (55°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities less enjoyable and requiring extra layers for comfort while traveling.
In Kiili 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 Kiili for better planning.
UV Risk Categories
Weather in Kiili varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kiili, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 42 mm (1.7 inches) | 92% | low |
| February Weather | -3°C (27°F) | 47 mm (1.9 inches) | 91% | low |
| March Weather | 0°C (32°F) | 48 mm (1.9 inches) | 90% | moderate |
| April Weather | 5°C (41°F) | 44 mm (1.7 inches) | 87% | moderate |
| May Weather | 10°C (51°F) | 57 mm (2.2 inches) | 76% | moderate |
| June Weather | 16°C (61°F) | 63 mm (2.5 inches) | 80% | high |
| July Weather | 18°C (64°F) | 74 mm (2.9 inches) | 80% | high |
| August Weather | 16°C (62°F) | 106 mm (4.2 inches) | 83% | high |
| September Weather | 12°C (55°F) | 73 mm (2.9 inches) | 87% | moderate |
| October Weather | 8°C (46°F) | 91 mm (3.6 inches) | 90% | low |
| November Weather | 4°C (39°F) | 53 mm (2.1 inches) | 91% | low |
| December Weather | -1°C (31°F) | 55 mm (2.2 inches) | 90% | low |