With a population of around 4,900, Cullalabo del Sur sits in Cagayan Valley, Philippines. The city operates in the Asia/Manila time zone.
In 2025, Cullalabo del Sur recorded an average annual temperature of 79°F. The hottest temperatures reached 95°F in May; the coolest were 66°F in March. Total precipitation for the year was 141 inches, with the wettest month being December.
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