Live UV forecast for 15 cities
Guinea-Bissau stretches from 11.7333° to 12.28° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 10 in Xitole (peak in April), while in Sintra-Nema the yearly maximum is only ≈ 9.9.
| Zone | Cities | J | F | M | A | M | J | J | A | S | O | N | D | Peak |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tropical | 15 | 8.2 | 8.9 | 9.6 | 9.9 | 9.9 | 9.7 | 9.8 | 9.9 | 9.8 | 9.4 | 8.7 | 8.1 | 9.9 |
Calculated clear-sky noon peaks at the average latitude of each zone. Real values vary with clouds, altitude and ozone.
Using Bissau as a reference: the UV index reaches 6+ in January, February, March, April, May, June, July, August, September, October, November and December. In the sunniest zones (see table) SPF 30–50+ is needed almost year-round; in the mildest — only in late spring and summer.
The calculated clear-sky maximum is ≈ 10 — in Xitole around April. Values above this occur only near the equator and in high mountains.
Xitole (peak ≈ 10), followed by Bafata and Bairro Militar. The mildest sun is in Sintra-Nema (max ≈ 9.9).
In Bissau and similar latitudes the UV reaches 6+ in January, February, March, April, May, June, July, August, September, October, November and December: use SPF 30–50+ on sunny days. Protection is advised from UV 3.
No — the local maximum is ≈ 10. UV 11+ occurs only near the equator, in deserts and high mountains.