Some regions, such as Kalimantan and Sumatra, experience only slight differences in rainfall and temperature between the seasons, whereas others, such as Nusa Tenggara, experience far more pronounced differences with droughts in the dry season and floods in the wet. Rainfall varies across regions, with more in western Sumatra, Java, and the interiors of Kalimantan and Papua, and less in areas closer to Australia, such as Nusa Tenggara, which tend to be dry. The almost uniformly warm waters that constitute 81% of Indonesia's area ensure that land temperatures remain relatively constant. Humidity is quite high, at between 70 and 90%. Winds are moderate and generally predictable, with monsoons usually blowing in from the south and east in June through October and from the northwest in November through March. Typhoons and large-scale storms pose little hazard to mariners; significant dangers come from swift currents in channels, such as the Lombok and Sape straits.