San Guillermo

San Guillermo is a village in Cagayan Valley, Philippines, where daily life remains closely tied to the land and the weather.

The climate in San Guillermo is tropical and monsoon-driven. Expect high humidity year-round, strong afternoon rain showers during the monsoon months (typically May–October), and clearer skies between November and February. Average daytime temperatures hover around 30°C, with slightly cooler conditions in the December–January dry season.

Rain is a regular part of life in San Guillermo during the wet season. Locals often plan their errands around the midday lull, when skies are clearest. Typhoon remnants occasionally reach the region, bringing heavier and longer rainfall events.

The most comfortable time to visit San Guillermo is typically between November and February, when temperatures are slightly cooler, humidity is lower and rain is less frequent.

Check our current conditions, hourly forecast and weekly outlook above for the latest weather in San Guillermo. Forecasts are refreshed throughout the day so you always see the freshest data.