January Weather in San Mateo, Philippines

Last updated: August 27, 2025

In San Mateo, Philippines, the average temperature in January is a comfortable 23°C (74°F), with minimums dipping to 15°C (59°F) and maximums reaching up to 31°C (87°F). Prepare for a somewhat wet month, as precipitation averages 176 mm (6.9 in) over approximately 17 days. The air will feel a bit muggy too, with an average humidity of 77%. Enjoy your stay!

January Temperature in San Mateo

In January in San Mateo, the average temperature is 23°C (74°F). Maximums can reach 31°C (87°F) while minimums can drop to as low as 15°C (59°F). This makes it a perfect time for travelers to enjoy pleasant weather and outdoor activities.

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

The chart illustrates January temperature patterns in San Mateo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Mateo, January typically has an average temperature of 23°C (74°F), with highs reaching up to 31°C (87°F) and lows dropping to around 15°C (59°F).

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

January Precipitation in San Mateo

In San Mateo in January, the precipitation amount is 176 mm (6.9 in) spread over 17 days.

January Precipitation Trends in San Mateo

The chart displays monthly precipitation patterns in San Mateo, 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 Mateo, January typically receives around 176 mm (6.9 inches) of precipitation spread over approximately 17 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 Mateo

In San Mateo in January, humidity is 77%. With an average temperature of 23°C (74°F), this humidity feels like being enveloped in a warm, sticky blanket, making travel somewhat uncomfortable and requiring frequent hydration breaks to enjoy the sights without feeling overheated.

January Average Humidity in San Mateo

This chart illustrates the average monthly humidity levels in San Mateo, 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 Mateo is approximately 77%, 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 Mateo

In San Mateo 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 Mateo.

Maximum UV Index Levels in San Mateo for January

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

Data source: San Mateo 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 Mateo Compares to Other Months

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

This table compares monthly weather conditions in San Mateo, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	176 mm (6.9 inches)	77%	extreme
February Weather	23°C (74°F)	130 mm (5.1 inches)	73%	extreme
March Weather	25°C (77°F)	105 mm (4.1 inches)	71%	extreme
April Weather	26°C (80°F)	72 mm (2.8 inches)	73%	extreme
May Weather	28°C (83°F)	287 mm (11.3 inches)	77%	extreme
June Weather	29°C (84°F)	198 mm (7.8 inches)	85%	extreme
July Weather	28°C (82°F)	364 mm (14.3 inches)	86%	extreme
August Weather	27°C (82°F)	352 mm (13.9 inches)	87%	extreme
September Weather	27°C (81°F)	265 mm (10.4 inches)	87%	extreme
October Weather	26°C (79°F)	220 mm (8.7 inches)	86%	extreme
November Weather	25°C (78°F)	269 mm (10.6 inches)	89%	very high
December Weather	24°C (75°F)	272 mm (10.7 inches)	85%	very high