nomadseason

September Weather in Onou, Micronesia

Last updated: August 28, 2025

In September, the average temperature in Onou, Micronesia hovers around 28°C (82°F), providing a warm and inviting atmosphere. The temperature can dip to a minimum of 25°C (78°F) and peak at a comfortable 29°C (85°F). Expect considerable precipitation, with about 246 mm (9.7 in) falling over 27 days, contributing to the region's lush surroundings. Humidity averages a high 79%, ensuring a tropical feel throughout the month.

September Temperature in Onou

In September in Onou, 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 Onou: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Onou, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onou, 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).
JanFebMarAprMayJunJulAugSepOctNovDec818181818281818182828282
Data source: Temperature data for Onou 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 Onou

In Onou in September, the total precipitation amount is 246 mm (9.7 in) spread over 27 days.

September Precipitation Trends in Onou

The chart displays monthly precipitation patterns in Onou, 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 Onou, September typically receives around 246 mm (9.7 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec16796151130203262266276246252256277
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Onou

In Onou in September humidity is 79%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket wrapping around you, making outdoor exploration more strenuous and requiring frequent breaks for hydration.

September Average Humidity in Onou

This chart illustrates the average monthly humidity levels in Onou, 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 Onou is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%82%83%82%80%79%77%77%79%78%78%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Onou

In Onou 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 Onou, you can check here.

Maximum UV Index Levels in Onou for September

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

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

This table compares monthly weather conditions in Onou, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (82°F)167 mm (6.6 inches)82%extreme
February Weather27°C (82°F)96 mm (3.8 inches)82%extreme
March Weather27°C (81°F)151 mm (5.9 inches)83%extreme
April Weather27°C (82°F)130 mm (5.1 inches)82%extreme
May Weather28°C (82°F)203 mm (8.0 inches)80%extreme
June Weather27°C (82°F)262 mm (10.3 inches)78%extreme
July Weather27°C (82°F)266 mm (10.5 inches)77%extreme
August Weather27°C (82°F)276 mm (10.9 inches)77%extreme
September Weather28°C (82°F)246 mm (9.7 inches)79%extreme
October Weather28°C (82°F)252 mm (9.9 inches)78%extreme
November Weather28°C (82°F)256 mm (10.1 inches)78%extreme
December Weather28°C (82°F)277 mm (10.9 inches)81%extreme

Compare Onou's Climate with Cities Worldwide