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May Weather in Siayan, Philippines

Last updated: August 27, 2025

In Siayan, Philippines, the average temperature in May is a warm 27°C (80°F). Expect a minimum of 23°C (74°F) and a peak of 30°C (86°F) throughout the month. Be prepared for significant rainfall, with an average precipitation amount of 273 mm (10.8 in) spread over 28 days. The atmosphere is quite humid, boasting an average humidity of 83%, creating a lush, tropical feel.

May Temperature in Siayan

In May in Siayan, the average temperature is 27°C (80°F), with maximums reaching 30°C (86°F) and minimums dropping to as low as 23°C (74°F). This mild and pleasant weather makes it an ideal time for travelers to explore and enjoy outdoor activities.

May Weather in Siayan: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Siayan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siayan, May typically has an average temperature of 27°C (80°F), with highs reaching up to 30°C (86°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec787879808080797979797979
Data source: Temperature data for Siayan 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.

May Precipitation in Siayan

In Siayan in May, the total precipitation amount is 273 mm (10.8 in) over the course of 28 days.

May Precipitation Trends in Siayan

The chart displays monthly precipitation patterns in Siayan, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Siayan, May typically receives around 273 mm (10.8 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec141959184273257284210320314206187
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Siayan

In Siayan in May, humidity is 83%. With an average temperature of 27°C (80°F), this humidity feels like a warm, steamy embrace, making traveling a bit uncomfortable as the air clings to your skin and renders even the slightest exertion more exhausting.

May Average Humidity in Siayan

This chart illustrates the average monthly humidity levels in Siayan, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Siayan is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%86%84%82%83%85%86%87%89%85%87%91%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Siayan

In Siayan in May, 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 Siayan, you can check here.

Maximum UV Index Levels in Siayan for May

The chart shows the monthly maximum UV Index (UVI) for Siayan in May, 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 May, the maximum UV index in Siayan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131416161413131415141211
Data source: Siayan May 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 May Weather in Siayan Compares to Other Months

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

This table compares monthly weather conditions in Siayan, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)141 mm (5.6 inches)88%extreme
February Weather25°C (78°F)95 mm (3.7 inches)86%extreme
March Weather26°C (79°F)91 mm (3.6 inches)84%extreme
April Weather27°C (80°F)84 mm (3.3 inches)82%extreme
May Weather27°C (80°F)273 mm (10.8 inches)83%extreme
June Weather27°C (80°F)257 mm (10.1 inches)85%extreme
July Weather26°C (80°F)284 mm (11.2 inches)86%extreme
August Weather26°C (80°F)210 mm (8.3 inches)87%extreme
September Weather26°C (79°F)320 mm (12.6 inches)89%extreme
October Weather26°C (79°F)314 mm (12.3 inches)85%extreme
November Weather26°C (79°F)206 mm (8.1 inches)87%extreme
December Weather26°C (79°F)186 mm (7.3 inches)91%extreme

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