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September Weather in Ullong, Indonesia

Last updated: August 23, 2025

In Ullong, Indonesia, the average temperature in September hovers around 21°C (70°F), with temperatures ranging from a cool 17°C (63°F) to a warm 27°C (80°F). This month also brings considerable precipitation, totaling 431 mm (17.0 in) over 28 days. Expect a high level of humidity, averaging 83%, making it a moist time of year.

September Temperature in Ullong

In September in Ullong, the average temperature is 21°C (70°F). The maximum can reach 27°C (80°F) and the minimum can be as low as 17°C (63°F). This mild and pleasant weather makes it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates September temperature patterns in Ullong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ullong, September typically has an average temperature of 21°C (70°F), with highs reaching up to 27°C (80°F) and lows dropping to around 17°C (63°F).
JanFebMarAprMayJunJulAugSepOctNovDec717170717170707070717171
Data source: Temperature data for Ullong 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 Ullong

In Ullong in September, the precipitation amount is 431 mm (17.0 in) over a span of 28 days.

September Precipitation Trends in Ullong

The chart displays monthly precipitation patterns in Ullong, 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 Ullong, September typically receives around 431 mm (17.0 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec739946126111096893594003764315708381089
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ullong

In Ullong in September humidity is 83%. With an average temperature of 21°C (70°F), this humidity feels like you’re enveloped in a warm, tropical embrace, making it essential to stay hydrated and take breaks during your travels.

September Average Humidity in Ullong

This chart illustrates the average monthly humidity levels in Ullong, 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 Ullong is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%83%80%83%80%82%83%85%83%83%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ullong

In Ullong in September, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Ullong.

Maximum UV Index Levels in Ullong for September

The chart shows the monthly maximum UV Index (UVI) for Ullong 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 Ullong typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec161818181513131516161515
Data source: Ullong 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 Ullong Compares to Other Months

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

This table compares monthly weather conditions in Ullong, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (71°F)739 mm (29.1 inches)81%extreme
February Weather21°C (71°F)946 mm (37.2 inches)83%extreme
March Weather21°C (71°F)1261 mm (49.7 inches)80%extreme
April Weather22°C (71°F)1109 mm (43.7 inches)83%extreme
May Weather22°C (71°F)689 mm (27.1 inches)80%extreme
June Weather21°C (70°F)359 mm (14.1 inches)82%extreme
July Weather21°C (70°F)400 mm (15.8 inches)83%extreme
August Weather21°C (70°F)376 mm (14.8 inches)85%extreme
September Weather21°C (70°F)431 mm (17.0 inches)83%extreme
October Weather21°C (71°F)570 mm (22.5 inches)82%extreme
November Weather22°C (71°F)838 mm (33.0 inches)82%extreme
December Weather22°C (71°F)1089 mm (42.9 inches)80%extreme

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