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September Weather in Iisaku, Estonia

Last updated: August 23, 2025

In Iisaku, Estonia, the average temperature in September hovers around 13°C (55°F), offering a mild climate perfect for exploration. Expect minimums of 3°C (39°F) and highs reaching up to 24°C (75°F). With 74 mm (2.9 in) of precipitation spread over 14 days, a little rain may accompany you on your adventures. Don't forget to prepare for a relatively high average humidity of 89%!

September Temperature in Iisaku

In September in Iisaku, the average temperature is 13°C (55°F). Maximums can reach 24°C (75°F), and minimums can be as low as 3°C (39°F). It's a great time for travelers to enjoy the mild weather and explore the sights comfortably.

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

The chart illustrates September temperature patterns in Iisaku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iisaku, 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 3°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec272630395163656355453829
Data source: Temperature data for Iisaku 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 Iisaku

In Iisaku in September, the precipitation amount is 74 mm (2.9 in) over a span of 14 days.

September Precipitation Trends in Iisaku

The chart displays monthly precipitation patterns in Iisaku, 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 Iisaku, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec4950485062647990741007670
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Iisaku

In Iisaku 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 Iisaku

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

In Iisaku 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 Iisaku for better planning.

Maximum UV Index Levels in Iisaku for September

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

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

This table compares monthly weather conditions in Iisaku, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)49 mm (1.9 inches)95%low
February Weather-3°C (26°F)49 mm (1.9 inches)93%low
March Weather-1°C (30°F)48 mm (1.9 inches)90%moderate
April Weather4°C (39°F)50 mm (2.0 inches)87%moderate
May Weather11°C (51°F)62 mm (2.5 inches)73%moderate
June Weather17°C (63°F)64 mm (2.5 inches)77%high
July Weather18°C (66°F)79 mm (3.1 inches)80%high
August Weather17°C (63°F)90 mm (3.6 inches)84%high
September Weather13°C (55°F)74 mm (2.9 inches)89%moderate
October Weather7°C (46°F)100 mm (3.9 inches)92%low
November Weather3°C (38°F)76 mm (3.0 inches)93%low
December Weather-2°C (29°F)70 mm (2.7 inches)93%low

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