January Weather in San Isidro, Philippines

Last updated: August 27, 2025

In January, the average temperature in San Isidro, Philippines is a pleasant 26°C (79°F). Visitors can expect a minimum of 22°C (73°F) and a maximum of 31°C (87°F). However, with an average precipitation of 105 mm (4.1 in) over 13 days, it's wise to pack an umbrella! The atmosphere is quite humid, maintaining an average of 78% humidity throughout the month.

January Temperature in San Isidro

In January in San Isidro, the average temperature is 26°C (79°F), with maximums reaching 31°C (87°F) and minimums dropping as low as 22°C (73°F). This pleasant climate makes San Isidro an ideal destination for travelers seeking warm and comfortable weather.

January Weather in San Isidro: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in San Isidro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Isidro, January typically has an average temperature of 26°C (79°F), with highs reaching up to 31°C (87°F) and lows dropping to around 22°C (73°F).

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

January Precipitation in San Isidro

In San Isidro in January, the precipitation amount is 105 mm (4.1 in) over the course of 13 days.

January Precipitation Trends in San Isidro

The chart displays monthly precipitation patterns in San Isidro, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In San Isidro, January typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 13 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in San Isidro

In San Isidro in January, humidity is 78%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket wrapping around you, making travel a bit sluggish as the air hangs thick, leaving you in need of frequent breaks to hydrate and find shade.

January Average Humidity in San Isidro

This chart illustrates the average monthly humidity levels in San Isidro, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in San Isidro is approximately 78%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in San Isidro

In San Isidro in January, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Isidro.

Maximum UV Index Levels in San Isidro for January

The chart shows the monthly maximum UV Index (UVI) for San Isidro in January, 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 January, the maximum UV index in San Isidro typically reaches 11, which falls under the extreme exposure category.

Data source: San Isidro January 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 January Weather in San Isidro Compares to Other Months

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

This table compares monthly weather conditions in San Isidro, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	105 mm (4.1 inches)	78%	extreme
February Weather	26°C (79°F)	74 mm (2.9 inches)	75%	extreme
March Weather	27°C (81°F)	51 mm (2.0 inches)	74%	extreme
April Weather	28°C (83°F)	47 mm (1.8 inches)	76%	extreme
May Weather	29°C (84°F)	151 mm (6.0 inches)	76%	extreme
June Weather	29°C (84°F)	219 mm (8.6 inches)	81%	extreme
July Weather	28°C (83°F)	313 mm (12.3 inches)	84%	extreme
August Weather	28°C (83°F)	242 mm (9.5 inches)	85%	extreme
September Weather	28°C (83°F)	315 mm (12.4 inches)	85%	extreme
October Weather	28°C (82°F)	252 mm (9.9 inches)	82%	extreme
November Weather	27°C (82°F)	197 mm (7.8 inches)	85%	extreme
December Weather	27°C (80°F)	215 mm (8.4 inches)	86%	extreme