San Mariano, in Cagayan Valley, Philippines, is home to roughly 12,400 people in the Asia/Manila time zone at 17°N latitude.
In 2025, San Mariano recorded an average annual temperature of 79°F. The hottest temperatures reached 97°F in June; the coolest were 65°F in February. Total precipitation for the year was 137 inches, with the wettest month being December.
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