nomadseason

September Weather in Sidoarjo, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Sidoarjo, Indonesia is a warm 28°C (83°F). Expect a comfortable minimum of 20°C (69°F) and the occasional high reaching 37°C (98°F). Rain is light, with an average precipitation of just 12 mm (0.5 in) over 2 days. The air is fairly humid, with an average humidity level of 72%. Enjoy the climate as you explore!

September Temperature in Sidoarjo

In September in Sidoarjo, the average temperature is 28°C (83°F). Maximums can reach 37°C (98°F) and minimums can drop to as low as 20°C (69°F). It's an ideal time for travelers who enjoy warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in Sidoarjo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sidoarjo, September typically has an average temperature of 28°C (83°F), with highs reaching up to 37°C (98°F) and lows dropping to around 20°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec818081828382818283858482
Data source: Temperature data for Sidoarjo generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Sidoarjo

In Sidoarjo in September, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.

September Precipitation Trends in Sidoarjo

The chart displays monthly precipitation patterns in Sidoarjo, 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 Sidoarjo, September typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec2933153121323922861239179293
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Sidoarjo

In Sidoarjo in September, humidity is 72%. With an average temperature of 28°C (83°F), this humidity feels like you're walking through a warm, damp blanket, making travel particularly stifling and sticky, where even short excursions can leave you feeling overheated and in need of frequent breaks for hydration.

September Average Humidity in Sidoarjo

This chart illustrates the average monthly humidity levels in Sidoarjo, 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 Sidoarjo is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%85%83%80%81%80%78%74%72%72%73%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sidoarjo

In Sidoarjo in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Sidoarjo, you can check here.

Maximum UV Index Levels in Sidoarjo for September

The chart shows the monthly maximum UV Index (UVI) for Sidoarjo 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 Sidoarjo typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141515131310121314141413
Data source: Sidoarjo 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 Sidoarjo Compares to Other Months

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

This table compares monthly weather conditions in Sidoarjo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)293 mm (11.5 inches)81%extreme
February Weather27°C (80°F)315 mm (12.4 inches)85%extreme
March Weather27°C (81°F)312 mm (12.3 inches)83%extreme
April Weather28°C (82°F)132 mm (5.2 inches)80%extreme
May Weather28°C (83°F)39 mm (1.5 inches)81%extreme
June Weather28°C (83°F)22 mm (0.9 inches)80%very high
July Weather27°C (82°F)8 mm (0.3 inches)78%extreme
August Weather28°C (82°F)5 mm (0.2 inches)74%extreme
September Weather28°C (83°F)12 mm (0.5 inches)72%extreme
October Weather29°C (85°F)38 mm (1.5 inches)72%extreme
November Weather29°C (84°F)179 mm (7.0 inches)73%extreme
December Weather28°C (82°F)293 mm (11.5 inches)75%extreme

Compare Sidoarjo's Climate with Cities Worldwide