Winters are cool with a mix of rainfall and snowfall, or mixed precipitation. Monsoon season provides most of the rainfall for the region. The southwest monsoon is responsible for bringing 90% of the annual rainfall to the region. Leaching of soils during periods of heavy rainfall depletes nutrients. Crop production can be affected by changes in rainfall and temperatures. Laterisation is a result of the heavy rainfall and humid conditions. Much of Jackson's rainfall occurs during thunderstorms. Laterite soils are formed in tropical regions with heavy rainfall. Thunderstorms bring much of Montgomery's rainfall. Annual rainfall in this region averages between . Autumn is similar to spring in temperature and lack of rainfall. Dampwood termites only attack lumber material exposed to rainfall or soil. The average yearly rainfall is approximately . Japan receives over half of its rainfall from typhoons. It grows at altitudes ranging from to in areas with heavy rainfall.