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September Weather in Siimusti, Estonia

Last updated: August 23, 2025

In September, the average temperature in Siimusti, Estonia hovers around 12°C (54°F). This month can bring a range of temperatures, with a minimum of 0°C (32°F) and a maximum of 25°C (77°F). Expect to see about 67 mm (2.6 in) of precipitation over 13 days, and prepare for a high average humidity of 89%.

September Temperature in Siimusti

In September in Siimusti, the average temperature is 12°C (54°F), with maximums reaching 25°C (77°F) and minimums dropping as low as 0°C (32°F). This mild weather makes Siimusti an ideal destination for travelers seeking a comfortable climate.

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

The chart illustrates September temperature patterns in Siimusti, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siimusti, 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 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec272631415162646154453729
Data source: Temperature data for Siimusti 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 Siimusti

In Siimusti in September, the precipitation amount is 67 mm (2.6 in) spread over 13 days.

September Precipitation Trends in Siimusti

The chart displays monthly precipitation patterns in Siimusti, 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 Siimusti, September typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec404547475164689067755355
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Siimusti

In Siimusti 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 Siimusti

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

In Siimusti 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 Siimusti for better planning.

Maximum UV Index Levels in Siimusti for September

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

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

This table compares monthly weather conditions in Siimusti, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)40 mm (1.6 inches)95%low
February Weather-3°C (26°F)44 mm (1.8 inches)93%low
March Weather0°C (32°F)47 mm (1.9 inches)90%moderate
April Weather5°C (41°F)47 mm (1.8 inches)87%moderate
May Weather11°C (51°F)51 mm (2.0 inches)73%moderate
June Weather17°C (62°F)64 mm (2.5 inches)77%high
July Weather18°C (64°F)68 mm (2.7 inches)80%high
August Weather16°C (62°F)90 mm (3.5 inches)84%high
September Weather12°C (54°F)67 mm (2.6 inches)89%moderate
October Weather7°C (45°F)75 mm (3.0 inches)92%low
November Weather3°C (38°F)53 mm (2.1 inches)93%low
December Weather-2°C (30°F)55 mm (2.2 inches)93%low

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