It is mostly hot with it being a little cold for about a month.
It is better to bring light, thin clothing and some sweaters or jackets for layering. It can be cool in the morning, then heat up, and cool back off in the evenings, so layering is your friend.
Most products can be found there, except deodorant is not what you would be used to in the U.S. Bring a full supply of it.
Sisters wear Chacos and Tevas in the summer. Bring a pair of closed toed shoes for meetings and for when it gets colder.
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Most parents send their Elders with at least 1 suit (most countries in South America only wear suits to church and meetings) and around 8–10 golf pants. Families are sending more shirts because of heat and humidity — 12–14 is the average. Note for Sisters serving in Brazil: feminine hygiene products are expensive there and tampons are often considered taboo. Be prepared to send a good supply with your Sister Missionary.
This is a very comfortable, durable shoe that missionaries serving all over have loved!
7 inch Rechargeable Fan. These have been recommended for missionaries serving in Mexico, Central and South America, the Caribbean and Africa. They help keep you cooler at night, but also help keep bugs like mosquitos off at night too.
The power goes out frequently, so it is nice to have a solar power fan.
This is a good rain jacket to have if you need the zip-out liner functionality.
Serve shirts have a ventilation panel in the side of the shirt making them noticeably more breathable. Missionaries serving in hot or humid places absolutely RAVE about this feature. The most popular shirt for hot-climate missions, for sure.