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September Weather in Union, Philippines

Last updated: August 27, 2025

In September, the average temperature in Union, Philippines hovers around 28°C (82°F), with minimums dipping to 25°C (78°F) and maximums soaring to 30°C (87°F). Expect a substantial precipitation of 222 mm (8.7 in) spread over 23 days, contributing to an average humidity of an impressive 90%. Enjoy the lush, vibrant atmosphere that this climate brings!

September Temperature in Union

In September in Union, the average temperature is 28°C (82°F). The maximum can reach 30°C (87°F), and the minimum can be as low as 25°C (78°F). This pleasant weather makes Union an ideal destination for travelers seeking warmth and comfort during this time of year.

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

The chart illustrates September temperature patterns in Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union, September typically has an average temperature of 28°C (82°F), with highs reaching up to 30°C (87°F) and lows dropping to around 25°C (78°F).
JanFebMarAprMayJunJulAugSepOctNovDec808081818282828282828281
Data source: Temperature data for Union 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 Union

In Union in September, the precipitation amount is 222 mm (8.7 in) over the course of 23 days.

September Precipitation Trends in Union

The chart displays monthly precipitation patterns in Union, 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 Union, September typically receives around 222 mm (8.7 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec184947056114250248190222262176276
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Union

In Union in September, humidity is 90%. With an average temperature of 28°C (82°F), this humidity feels like a heavy blanket enveloping you, making travel feel stifling and exhausting, as each step feels laborious and sweat clings to your skin.

September Average Humidity in Union

This chart illustrates the average monthly humidity levels in Union, 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 Union is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%80%77%78%85%87%88%89%90%87%90%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Union

In Union 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 Union, you can check here.

Maximum UV Index Levels in Union for September

The chart shows the monthly maximum UV Index (UVI) for Union 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 Union typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121416161413131414131211
Data source: Union 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 Union Compares to Other Months

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

This table compares monthly weather conditions in Union, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)184 mm (7.2 inches)85%extreme
February Weather26°C (80°F)94 mm (3.7 inches)80%extreme
March Weather27°C (81°F)70 mm (2.8 inches)77%extreme
April Weather27°C (82°F)56 mm (2.2 inches)78%extreme
May Weather28°C (83°F)114 mm (4.5 inches)84%extreme
June Weather28°C (83°F)250 mm (9.8 inches)87%extreme
July Weather28°C (82°F)248 mm (9.8 inches)88%extreme
August Weather28°C (83°F)190 mm (7.5 inches)89%extreme
September Weather28°C (82°F)222 mm (8.7 inches)90%extreme
October Weather28°C (82°F)262 mm (10.3 inches)87%extreme
November Weather28°C (82°F)176 mm (6.9 inches)90%extreme
December Weather27°C (81°F)276 mm (10.9 inches)91%extreme

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