Tomorrow is going to be a brilliant, sun-drenched day in Itamirim, with skies staying clear from dawn until dusk. The heat will build steadily through the morning, and by midday the sun will feel intense and direct on your skin. Low humidity, around 56 percent, keeps the air feeling lighter and more comfortable than a typical tropical scorcher, so the 29 degree high won't weigh you down as much as it could.

Temperatures will swing dramatically from a cool 13 degrees at sunrise to the peak of 29 degrees in the afternoon, so you'll want layers for the early hours. That crisp start will quickly give way to warmth, and the low humidity means you won't feel sticky or clammy as the day heats up. There is zero chance of rain, so no umbrella needed, but a steady wind from the southeast at 20 kilometers per hour will provide a welcome breeze, especially during the hottest part of the afternoon.

The sun will be fierce with an ultraviolet index of 8.4, which falls in the very high category, so unprotected skin can burn in minutes. The combination of strong sunshine and that brisk wind might make you underestimate how quickly you can get burned, so plan ahead if you will be outside for more than a few minutes.

For a concrete takeaway, start your morning with a light jacket or sweater for the cool start, then shed it as the sun climbs. Slather on high SPF sunscreen, wear a hat, and bring sunglasses, because the wind and sun together will be deceptive. If you have outdoor plans, aim to tackle them early or late in the day to dodge the worst of the noon sun, and keep a water bottle handy even though the air feels dry.