This mission is HOT!! Like really hot! It has lots of days with 100 degree + temps. It cools down a bit in the fall and winter. The days are still warm, but it can get a little chilly at night. It is not really rainy.
Bring light-weight clothing! Elders: mostly short sleeved shirts. They do need suits and wear them frequently.
A good sun hat will be invaluable.
There is a lot of walking. you will wear out your shoes, so get good quality shoes that are comfortable.
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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.