The average rainfall value for San Fernando La Union over the past 30 years is 1780 mm (millimetre).
In city of San Fernando La Union, the rainfall in January is 2 mm; The rainfall in February is 3 mm; The rainfall in March is 14 mm; The rainfall in April is 66 mm; The rainfall in May is 159 mm; The rainfall in June is 233 mm; The rainfall in July is 351 mm; The rainfall in August is 418 mm; The rainfall in September is 313 mm; The rainfall in October is 170 mm; The rainfall in November is 43mm; The rainfall in December is 8 mm.
Rainfall is the fall of atmospheric moisture in the form of water due to gravity. Rainfall does not occur unless cloud droplets become so large due to coalescence that the air becomes unable to hold them.
Address: San Fernando, La Union, Philippines.