Live UV forecast for 1 cities
Antigua and Barbuda stretches from 17.121° to 17.121° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 9.5 in Saint John's (peak in May), while in Saint John's the yearly maximum is only ≈ 9.5.
| Zone | Cities | J | F | M | A | M | J | J | A | S | O | N | D | Peak |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tropical | 1 | 7.2 | 8 | 8.9 | 9.4 | 9.5 | 9.5 | 9.5 | 9.5 | 9.2 | 8.6 | 7.8 | 7.1 | 9.5 |
Calculated clear-sky noon peaks at the average latitude of each zone. Real values vary with clouds, altitude and ozone.
Using Saint John's 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 ≈ 9.5 — in Saint John's around May. Values above this occur only near the equator and in high mountains.
Saint John's (peak ≈ 9.5), followed by
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and
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. The mildest sun is in Saint John's (max ≈ 9.5).
In Saint John's 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 ≈ 9.5. UV 11+ occurs only near the equator, in deserts and high mountains.