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September Weather in Onoun, Micronesia

Last updated: August 28, 2025

In Onoun, Micronesia, the average temperature in September is a warm 28°C (82°F), with a minimum of 25°C (78°F) and a maximum reaching up to 29°C (85°F). Visitors can expect significant rainfall, with 243 mm (9.6 in) over approximately 25 days, creating a lush atmosphere. The average humidity sits at a comfortable 80%, making for a tropical experience. Enjoy the vibrant beauty that this season has to offer!

September Temperature in Onoun

In September in Onoun, the average temperature is 28°C (82°F), with maximums reaching 29°C (85°F) and minimums dropping to as low as 25°C (78°F). This mild climate makes it an ideal destination for travelers seeking pleasant weather.

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

The chart illustrates September temperature patterns in Onoun, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onoun, September typically has an average temperature of 28°C (82°F), with highs reaching up to 29°C (85°F) and lows dropping to around 25°C (78°F).
JanFebMarAprMayJunJulAugSepOctNovDec828181818281818182828282
Data source: Temperature data for Onoun 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 Onoun

In Onoun in September, the precipitation amount is 243 mm (9.6 in) during 25 days, indicating a significant level of rainfall for that period.

September Precipitation Trends in Onoun

The chart displays monthly precipitation patterns in Onoun, 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 Onoun, September typically receives around 243 mm (9.6 inches) of precipitation spread over approximately 25 days.
JanFebMarAprMayJunJulAugSepOctNovDec173102170160213274269273243248251272
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Onoun

In Onoun in September, humidity is 80%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket enveloping you, making outdoor activities sweaty and demanding frequent breaks in the shade while traveling.

September Average Humidity in Onoun

This chart illustrates the average monthly humidity levels in Onoun, 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 Onoun is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%82%83%82%80%78%78%77%80%78%78%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Onoun

In Onoun 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 Onoun, you can check here.

Maximum UV Index Levels in Onoun for September

The chart shows the monthly maximum UV Index (UVI) for Onoun 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 Onoun typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131416161414141414141311
Data source: Onoun 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 Onoun Compares to Other Months

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

This table compares monthly weather conditions in Onoun, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (82°F)173 mm (6.8 inches)82%extreme
February Weather27°C (82°F)102 mm (4.0 inches)82%extreme
March Weather27°C (81°F)170 mm (6.7 inches)83%extreme
April Weather27°C (82°F)160 mm (6.3 inches)82%extreme
May Weather28°C (82°F)213 mm (8.4 inches)80%extreme
June Weather27°C (82°F)274 mm (10.8 inches)78%extreme
July Weather27°C (82°F)269 mm (10.6 inches)78%extreme
August Weather27°C (82°F)273 mm (10.8 inches)77%extreme
September Weather28°C (82°F)243 mm (9.6 inches)80%extreme
October Weather28°C (82°F)248 mm (9.8 inches)78%extreme
November Weather28°C (82°F)251 mm (9.9 inches)78%extreme
December Weather28°C (82°F)272 mm (10.7 inches)81%extreme

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