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September Weather in Siauliai, Lithuania

Last updated: August 23, 2025

In September, the average temperature in Siauliai, Lithuania hovers around 13°C (56°F). Expect a range where the minimum dips to -2°C (29°F) and the maximum can reach 28°C (82°F). Rainfall could be frequent, bringing about 62 mm (2.4 in) over 10 days, all while the average humidity rests around a balmy 83%.

September Temperature in Siauliai

In September in Siauliai, the average temperature is 13°C (56°F), with maximums reaching 28°C (82°F) and minimums dipping as low as -2°C (29°F). Be prepared for a wide range of temperatures when traveling during this time!

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

The chart illustrates September temperature patterns in Siauliai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siauliai, September typically has an average temperature of 13°C (56°F), with highs reaching up to 28°C (82°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec292935445363646356474031
Data source: Temperature data for Siauliai 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 Siauliai

In Siauliai in September, the total precipitation amount is 62 mm (2.4 in) over a period of 10 days.

September Precipitation Trends in Siauliai

The chart displays monthly precipitation patterns in Siauliai, 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 Siauliai, September typically receives around 62 mm (2.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec443645356551917562605250
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Siauliai

In Siauliai in September humidity is 83%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making travel a bit uncomfortable as the air feels heavy and the moisture clings to your skin.

September Average Humidity in Siauliai

This chart illustrates the average monthly humidity levels in Siauliai, 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 Siauliai is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%92%90%86%72%74%76%74%83%91%93%95%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Siauliai

In Siauliai in September, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Siauliai.

Maximum UV Index Levels in Siauliai for September

The chart shows the monthly maximum UV Index (UVI) for Siauliai 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 Siauliai typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123567765321
Data source: Siauliai 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 Siauliai Compares to Other Months

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

This table compares monthly weather conditions in Siauliai, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)44 mm (1.7 inches)94%low
February Weather-2°C (29°F)36 mm (1.4 inches)92%low
March Weather1°C (35°F)45 mm (1.8 inches)90%moderate
April Weather6°C (44°F)35 mm (1.4 inches)86%moderate
May Weather12°C (53°F)65 mm (2.5 inches)72%high
June Weather17°C (64°F)51 mm (2.0 inches)74%high
July Weather18°C (65°F)91 mm (3.6 inches)76%high
August Weather17°C (63°F)75 mm (2.9 inches)74%high
September Weather13°C (56°F)62 mm (2.4 inches)83%moderate
October Weather9°C (48°F)60 mm (2.4 inches)91%moderate
November Weather4°C (40°F)52 mm (2.1 inches)93%low
December Weather0°C (32°F)50 mm (2.0 inches)95%low

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