September Weather in Casian, Philippines

Last updated: August 27, 2025

In Casian, Philippines, the average temperature in September reaches a warm 28°C (82°F), with daily lows of 25°C (78°F) and highs peaking at 31°C (89°F). Prepare for some rain, as the region sees about 259 mm (10.2 in) of precipitation spread over 25 days, contributing to an average humidity of 86%—making it a perfectly tropical destination!

September Temperature in Casian

In September in Casian, the average temperature is 28°C (82°F). Maximum temperatures can reach 31°C (89°F) while minimums can drop to as low as 25°C (78°F). This pleasant climate makes Casian an ideal destination for travelers seeking sunny and warm weather.

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

The chart illustrates September temperature patterns in Casian, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casian, September typically has an average temperature of 28°C (82°F), with highs reaching up to 31°C (89°F) and lows dropping to around 25°C (78°F).

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

September Precipitation in Casian

In Casian in September, the precipitation amount is 259 mm (10.2 in) occurring over 25 days.

September Precipitation Trends in Casian

The chart displays monthly precipitation patterns in Casian, 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 Casian, September typically receives around 259 mm (10.2 inches) of precipitation spread over approximately 25 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Casian

In Casian in September, humidity is 86%. With an average temperature of 28°C (82°F), this humidity feels like a warm blanket wrapped around you, making travel quite challenging as you navigate the thick, moisture-laden air that can leave you feeling sticky and fatigued.

September Average Humidity in Casian

This chart illustrates the average monthly humidity levels in Casian, 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 Casian is approximately 86%, 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 Casian

In Casian 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 Casian.

Maximum UV Index Levels in Casian for September

The chart shows the monthly maximum UV Index (UVI) for Casian 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 Casian typically reaches 15, which falls under the extreme exposure category.

Data source: Casian 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 Casian Compares to Other Months

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

This table compares monthly weather conditions in Casian, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	135 mm (5.3 inches)	80%	extreme
February Weather	27°C (80°F)	72 mm (2.9 inches)	77%	extreme
March Weather	27°C (81°F)	81 mm (3.2 inches)	77%	extreme
April Weather	28°C (83°F)	48 mm (1.9 inches)	79%	extreme
May Weather	28°C (83°F)	159 mm (6.3 inches)	79%	extreme
June Weather	28°C (83°F)	241 mm (9.5 inches)	81%	extreme
July Weather	28°C (82°F)	311 mm (12.2 inches)	82%	extreme
August Weather	28°C (82°F)	241 mm (9.5 inches)	84%	extreme
September Weather	28°C (82°F)	259 mm (10.2 inches)	86%	extreme
October Weather	27°C (82°F)	324 mm (12.8 inches)	81%	extreme
November Weather	28°C (82°F)	231 mm (9.1 inches)	84%	extreme
December Weather	27°C (81°F)	286 mm (11.2 inches)	86%	extreme