The hottest months are August and September, the coolest January and February. Rainfall is scant, which accounts for the island's arid landscape. The precious few clouds that pass this way drop their meager load between October and January. It's therefore best to visit outside this period, when you can expect room rates to be almost half those charged during the busier months of the year. Aruba is not keen on visas.
Most nationalities require just a passport.
US and Canadian citizens can visit with proof of citizenship, such as a photo ID and a birth certificate. A roundtrip or onward ticket is required of all visitors. No-one comes to Aruba looking for a cheap holiday. Most visitors come to the island on package tours to luxury resorts. Aruba has its own currency but, since most visitors are from North America, the US dollar is also used.