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September Weather in Mustla, Estonia

Last updated: August 23, 2025

In September, the average temperature in Mustla, Estonia hovers around 13°C (55°F), with a minimum of -3°C (26°F) and a maximum reaching 26°C (78°F). Expect moderate rain with 77 mm (3.0 in) of precipitation spread over about 15 days, accompanied by a high average humidity of 87%.

September Temperature in Mustla

In September in Mustla, the average temperature is 13°C (55°F). Maximums can reach 26°C (78°F), while minimums can drop as low as -3°C (26°F). This range makes it essential for travelers to pack layers to stay comfortable throughout the day.

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

The chart illustrates September temperature patterns in Mustla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mustla, September typically has an average temperature of 13°C (55°F), with highs reaching up to 26°C (78°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec292733415262646255463831
Data source: Temperature data for Mustla 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 Mustla

In Mustla in September, the precipitation amount is 77 mm (3.0 in) over a span of 15 days.

September Precipitation Trends in Mustla

The chart displays monthly precipitation patterns in Mustla, 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 Mustla, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec394756475174799477875954
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mustla

In Mustla in September, humidity is 87%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making travel sluggish and slightly uncomfortable, as each step seems to cling to the damp air.

September Average Humidity in Mustla

This chart illustrates the average monthly humidity levels in Mustla, 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 Mustla is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%91%90%87%76%80%80%83%87%90%91%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mustla

In Mustla 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 Mustla for better planning.

Maximum UV Index Levels in Mustla for September

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

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

This table compares monthly weather conditions in Mustla, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)39 mm (1.5 inches)92%low
February Weather-3°C (27°F)47 mm (1.9 inches)91%low
March Weather0°C (33°F)56 mm (2.2 inches)90%moderate
April Weather5°C (42°F)47 mm (1.8 inches)87%moderate
May Weather11°C (52°F)51 mm (2.0 inches)76%moderate
June Weather17°C (62°F)74 mm (2.9 inches)80%high
July Weather18°C (64°F)79 mm (3.1 inches)80%high
August Weather17°C (62°F)94 mm (3.7 inches)83%high
September Weather13°C (55°F)77 mm (3.0 inches)87%moderate
October Weather8°C (46°F)87 mm (3.4 inches)90%low
November Weather4°C (39°F)59 mm (2.3 inches)91%low
December Weather-1°C (31°F)54 mm (2.1 inches)90%low

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