Heavy rainfall is distributed during the months of July, August and September with an average of 400 millimeters. During such months when precipitation is heaviest, the Tarlac river swells flooding the areas surrounding it and causing widespread damage to crops and properties. January, the coldest month, registers a temperature of 79 degrees Fahrenheit. In the eastern section where population is numerous, the soil is composed of alluvial deposits having medium to coarse texture and with good drainage qualities suitable for planting the principal crops of the province. Palay production has contributed to the income gathered from agricultural products.
Sugarcane is the next important produce of the province.
Corn, tobacco, fruits and tubers, the minor crops of Tarlac, are also planted in these areas. In the boundaries of Tarlac and Zambales are forest lands that provide timber for the logging industries. Mining areas are along the western section with mineral reserves consisting of metals like manganese and iron and non-metals are construction materials, ceramics and refractory minerals. Tarlac, being landlocked, has no marine resources. Inland fishing, however, can be developed since the province has several freshwater section which can be utilised for fishponds.