Relative humidity
Relative humidity is indicative of the amount of water vapor present in the atmosphere. Humidity in the Philippines as in the municipality of San Jose is high because of the warm moist air streams flowing over the archipelago, the surrounding seas, rich vegetation and abundant rainfall. The lowest average relative humidity occurs in May with 85.9%; highest in February with 93.4%; and the annual average humidity is 90% which is higher than the regional and national average of 82%.