San Mateo, in Cagayan Valley, Philippines, is home to roughly 16,200 people in the Asia/Manila time zone at 16.9°N latitude.
In 2025, San Mateo averaged an annual temperature of 78°F, with hottest temperatures reaching 95°F in June and lowest around 67°F in January. The city received approximately 141 inches of precipitation during the year.
View historical weather for San Mateo · More cities in Cagayan Valley