September Weather in Union, Philippines

Last updated: August 27, 2025

The average temperature in Union, Philippines during September hovers around 27°C (81°F). Expect a minimum of 25°C (77°F) and a maximum of 29°C (84°F). Rainfall can be significant, with an average precipitation amount of 372 mm (14.7 in) spread across 24 days, creating a humid atmosphere with an average humidity of 85%.

September Temperature in Union

In September in Union, the average temperature is 27°C (81°F). Maximums can reach 29°C (84°F), while minimums can drop to 25°C (77°F). This mild and pleasant weather makes Union an ideal destination for travelers seeking warmth and comfort.

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 27°C (81°F), with highs reaching up to 29°C (84°F) and lows dropping to around 25°C (77°F).

Data source: Temperature data for Union generated using information from the Copernicus Climate Change Service.

September Precipitation in Union

In Union in September, the total precipitation amount is 372 mm (14.7 in) spread over a duration of 24 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 372 mm (14.7 inches) of precipitation spread over approximately 24 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Union

In Union in September humidity is 85%. With an average temperature of 27°C (81°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier as sweat clings to your skin and the air feels almost tangible, which can be quite challenging for traveling.

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 85%, offering insight into how humid the weather typically is during this month.

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 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 Union.

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 15, which falls under the extreme exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	205 mm (8.1 inches)	81%	extreme
February Weather	26°C (78°F)	113 mm (4.5 inches)	78%	extreme
March Weather	26°C (79°F)	102 mm (4.0 inches)	76%	extreme
April Weather	27°C (81°F)	54 mm (2.1 inches)	77%	extreme
May Weather	28°C (82°F)	128 mm (5.1 inches)	78%	extreme
June Weather	27°C (82°F)	297 mm (11.7 inches)	80%	extreme
July Weather	27°C (81°F)	421 mm (16.6 inches)	81%	extreme
August Weather	27°C (81°F)	320 mm (12.6 inches)	83%	extreme
September Weather	27°C (81°F)	372 mm (14.7 inches)	85%	extreme
October Weather	27°C (81°F)	385 mm (15.1 inches)	80%	extreme
November Weather	27°C (81°F)	249 mm (9.8 inches)	83%	extreme
December Weather	26°C (80°F)	339 mm (13.3 inches)	86%	extreme