Vitamin D in Brazil in July: sun, UV and what to expect
Good Good. A full dose takes about 11 minutes at midday, and the usable window is about 5.1 hours a day.
5.1 hsun window (UV 2.5+)
4.7peak UV Index
11 minto a full dose
24°Cafternoon high
8/30rainy days
26/30sunny days
Best places in Brazil in July: Fortaleza (excellent), Jericoacoara (excellent), Fernando de Noronha (excellent), Porto Seguro (good), Trancoso (good).
How long in the sun in July?
- Plan your sun session around midday (roughly 11:00 to 15:00), when the UV Index peaks at about 4.7. With about a quarter of your skin bare, a full dose takes around 11 minutes for skin type III at age 30, and about 21 minutes at age 65.
- Stop well before your skin turns pink. At this UV level skin type III can start to burn after about 43 minutes of midday sun, so cover up, find shade and use SPF 30+ on skin that stays out.
- Water, sand and light surfaces reflect UV, so at the beach you get a little more sun than the number suggests, for the good and the bad.
| Skin type | Full dose, age 30 | Full dose, age 65 | Time to burn |
|---|---|---|---|
| Type I | 8 min | 14 min | 28 min |
| Type II | 9 min | 18 min | 35 min |
| Type III | 11 min | 21 min | 43 min |
| Type IV | 17 min | 32 min | 64 min |
| Type V | 23 min | 43 min | 85 min |
| Type VI | 38 min | 71 min | 2.4 h |
Minutes at midday for about 1,000 IU of vitamin D with a quarter of the body bare, at Ilha Grande, the median coastal place. Time to burn is the time to reach one minimal erythemal dose and does not depend on age. A rough planning guide, not medical advice.
Places in Brazil in July
| Place | Rating | Sun window | Full dose | Afternoon high | Rainy days |
|---|---|---|---|---|---|
| Fortaleza | Excellent | 8.0 h | 7 min | 31°C | 8/30 |
| Jericoacoara | Excellent | 8.0 h | 7 min | 33°C | 3/30 |
| Fernando de Noronha | Excellent | 7.9 h | 7 min | 27°C | 14/30 |
| Porto Seguro | Good | 6.6 h | 9 min | 26°C | 16/30 |
| Trancoso | Good | 6.5 h | 9 min | 26°C | 15/30 |
| Búzios | Good | 6.0 h | 10 min | 26°C | 4/30 |
| Paraty | Good | 5.4 h | 11 min | 25°C | 8/30 |
| Rio de Janeiro | Good | 5.3 h | 11 min | 25°C | 7/30 |
| Ilha Grande | Good | 5.1 h | 11 min | 24°C | 8/30 |
| Natal | Bad weather | 7.7 h | 7 min | 28°C | 20/30 |
| Maceió | Bad weather | 7.4 h | 8 min | 27°C | 26/30 |
| Salvador | Bad weather | 7.0 h | 8 min | 26°C | 22/30 |
| Porto de Galinhas | Bad weather | 7.2 h | 8 min | 27°C | 27/30 |
| Recife | Bad weather | 7.4 h | 8 min | 27°C | 27/30 |
| Morro de São Paulo | Bad weather | 6.5 h | 9 min | 26°C | 29/30 |
| Florianópolis | Too cold | 3.1 h | 15 min | 19°C | 10/30 |
Other months in Brazil
- Jan Bad weather
- Feb Bad weather
- Mar Bad weather
- Apr Bad weather
- May Bad weather
- Jun Bad weather
- Jul Good
- Aug Bad weather
- Sep Excellent
- Oct Excellent
- Nov Excellent
- Dec Bad weather
Best months: July, September to November. Full Brazil guide