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September Weather in Tondano, Indonesia

Last updated: August 23, 2025

In September, the average temperature in Tondano, Indonesia reaches a pleasant 25°C (77°F). Temperatures can fluctuate, with a minimum of 20°C (68°F) and a maximum of 29°C (85°F). Expect about 240 mm (9.5 in) of precipitation over 21 days, contributing to an average humidity of 80%. Prepare accordingly for both warmth and moisture!

September Temperature in Tondano

In September in Tondano, the average temperature is 25°C (77°F). Maximum can reach 29°C (85°F), and minimum can be as low as 20°C (68°F). This pleasant weather makes it an ideal time to explore the sights and enjoy outdoor activities.

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

The chart illustrates September temperature patterns in Tondano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tondano, September typically has an average temperature of 25°C (77°F), with highs reaching up to 29°C (85°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec787778787877777777787878
Data source: Temperature data for Tondano 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 Tondano

In Tondano in September, the total precipitation amount is 240 mm (9.5 in) spread over 21 days.

September Precipitation Trends in Tondano

The chart displays monthly precipitation patterns in Tondano, 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 Tondano, September typically receives around 240 mm (9.5 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec222192252267314330277166240210237240
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Tondano

In Tondano in September humidity is 80%. With an average temperature of 25°C (77°F), this humidity feels like traveling through a warm, tropical rainforest where the air is thick and steamy, making even the simplest stroll feel like a workout.

September Average Humidity in Tondano

This chart illustrates the average monthly humidity levels in Tondano, 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 Tondano is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%84%84%82%76%78%80%82%80%78%77%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Tondano

In Tondano in September, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Tondano.

Maximum UV Index Levels in Tondano for September

The chart shows the monthly maximum UV Index (UVI) for Tondano 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 Tondano typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151617161413131415151413
Data source: Tondano 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 Tondano Compares to Other Months

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

This table compares monthly weather conditions in Tondano, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)222 mm (8.7 inches)80%extreme
February Weather25°C (78°F)192 mm (7.6 inches)84%extreme
March Weather25°C (78°F)252 mm (9.9 inches)84%extreme
April Weather26°C (78°F)267 mm (10.5 inches)82%extreme
May Weather26°C (79°F)314 mm (12.4 inches)76%extreme
June Weather25°C (78°F)330 mm (13.0 inches)78%extreme
July Weather25°C (77°F)277 mm (10.9 inches)80%extreme
August Weather25°C (77°F)166 mm (6.5 inches)82%extreme
September Weather25°C (77°F)240 mm (9.5 inches)80%extreme
October Weather25°C (78°F)210 mm (8.3 inches)78%extreme
November Weather26°C (78°F)237 mm (9.3 inches)77%extreme
December Weather26°C (79°F)240 mm (9.4 inches)78%extreme

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