January Weather in San Juan, Philippines

Last updated: August 27, 2025

In January, the average temperature in San Juan, Philippines is a pleasant 26°C (79°F), making it an ideal time to explore the area. Expect a minimum of 24°C (76°F) and a maximum of 28°C (83°F) throughout the month. However, be prepared for 186 mm (7.3 in) of precipitation spread over 21 days, contributing to an average humidity of 88%. Pack accordingly to fully enjoy your visit!

January Temperature in San Juan

In January in San Juan, the average temperature is 26°C (79°F). The maximum can reach 28°C (83°F), and the minimum can be as low as 24°C (76°F). This pleasant climate makes San Juan an ideal destination for travelers seeking warm weather and enjoyable outdoor activities.

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

The chart illustrates January temperature patterns in San Juan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Juan, January typically has an average temperature of 26°C (79°F), with highs reaching up to 28°C (83°F) and lows dropping to around 24°C (76°F).

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

January Precipitation in San Juan

In San Juan in January, the precipitation amount is 186 mm (7.3 in) during a span of 21 days.

January Precipitation Trends in San Juan

The chart displays monthly precipitation patterns in San Juan, 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 Juan, January typically receives around 186 mm (7.3 inches) of precipitation spread over approximately 21 days.

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

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Millimeters (mm) Inches (in)

January Humidity in San Juan

In San Juan in January, humidity is 88%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapped around you, making travel somewhat uncomfortable as you quickly become aware of the stickiness and heaviness in the air.

January Average Humidity in San Juan

This chart illustrates the average monthly humidity levels in San Juan, 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 Juan is approximately 88%, 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 Juan

In San Juan in January, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Juan.

Maximum UV Index Levels in San Juan for January

The chart shows the monthly maximum UV Index (UVI) for San Juan 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 Juan typically reaches 13, which falls under the extreme exposure category.

Data source: San Juan 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 Juan Compares to Other Months

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

This table compares monthly weather conditions in San Juan, 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)	186 mm (7.3 inches)	88%	extreme
February Weather	26°C (79°F)	137 mm (5.4 inches)	86%	extreme
March Weather	26°C (80°F)	98 mm (3.9 inches)	84%	extreme
April Weather	27°C (80°F)	72 mm (2.8 inches)	82%	extreme
May Weather	27°C (82°F)	184 mm (7.2 inches)	83%	extreme
June Weather	27°C (82°F)	158 mm (6.2 inches)	85%	extreme
July Weather	27°C (81°F)	183 mm (7.2 inches)	86%	extreme
August Weather	27°C (81°F)	143 mm (5.6 inches)	87%	extreme
September Weather	27°C (81°F)	190 mm (7.5 inches)	89%	extreme
October Weather	27°C (81°F)	227 mm (9.0 inches)	85%	extreme
November Weather	27°C (81°F)	247 mm (9.7 inches)	87%	extreme
December Weather	27°C (80°F)	243 mm (9.5 inches)	91%	extreme