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September Weather in Koosa, Estonia

Last updated: August 23, 2025

In September, the average temperature in Koosa, Estonia hovers around 13°C (55°F). Expect a comfortable range where the minimum dips to 0°C (33°F) and the maximum can peak at 25°C (78°F). During this time, anticipate around 59 mm (2.3 in) of precipitation spread over 10 days, contributing to a high average humidity of 89%.

September Temperature in Koosa

In September in Koosa, the average temperature is 13°C (55°F), with maximums reaching up to 25°C (78°F) and minimums dipping as low as 0°C (33°F). This makes it a great time for travelers who enjoy mild weather and the possibility of experiencing a range of temperatures.

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

The chart illustrates September temperature patterns in Koosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Koosa, September typically has an average temperature of 13°C (55°F), with highs reaching up to 25°C (78°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec282732415263656255453829
Data source: Temperature data for Koosa generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Koosa

In Koosa in September, the precipitation amount is 59 mm (2.3 in) over the course of 10 days.

September Precipitation Trends in Koosa

The chart displays monthly precipitation patterns in Koosa, 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 Koosa, September typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec384243495865637459705553
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Koosa

In Koosa 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 Koosa

This chart illustrates the average monthly humidity levels in Koosa, 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 Koosa is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec95%93%90%87%73%77%80%84%89%93%93%93%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Koosa

In Koosa 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 Koosa for better planning.

Maximum UV Index Levels in Koosa for September

The chart shows the monthly maximum UV Index (UVI) for Koosa 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 Koosa typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123457764211
Data source: Koosa 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 Koosa Compares to Other Months

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

This table compares monthly weather conditions in Koosa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)38 mm (1.5 inches)95%low
February Weather-3°C (27°F)42 mm (1.6 inches)93%low
March Weather0°C (33°F)43 mm (1.7 inches)90%moderate
April Weather5°C (41°F)49 mm (1.9 inches)87%moderate
May Weather11°C (52°F)58 mm (2.3 inches)73%moderate
June Weather17°C (63°F)65 mm (2.6 inches)77%high
July Weather18°C (65°F)63 mm (2.5 inches)80%high
August Weather17°C (63°F)74 mm (2.9 inches)84%high
September Weather13°C (55°F)59 mm (2.3 inches)89%moderate
October Weather7°C (46°F)70 mm (2.8 inches)92%low
November Weather3°C (38°F)55 mm (2.1 inches)93%low
December Weather-1°C (30°F)53 mm (2.1 inches)93%low

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