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UV Index in Cayman Islands

Live UV forecast for 2 cities

George TownUV index now → West BayUV index now →
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UV climate of Cayman Islands: overview

Cayman Islands stretches from 19.2866° to 19.382° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 9.4 in George Town (peak in May), while in West Bay the yearly maximum is only ≈ 9.3.

UV index by month by climate zone

ZoneCitiesJFMAMJJASONDPeak
Tropical2 6.8 7.6 8.5 9.2 9.3 9.3 9.3 9.3 9 8.2 7.4 6.7 9.3

Calculated clear-sky noon peaks at the average latitude of each zone. Real values vary with clouds, altitude and ozone.

Sunniest cities in Cayman Islands (highest UV)

Cities with the mildest sun

When do you need SPF in Cayman Islands?

Using George Town 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.

FAQ: UV index in Cayman Islands

What is the highest UV index in Cayman Islands?

The calculated clear-sky maximum is ≈ 9.4 — in George Town around May. Values above this occur only near the equator and in high mountains.

Which city in Cayman Islands is the sunniest?

George Town (peak ≈ 9.4), followed by West Bay and
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. The mildest sun is in West Bay (max ≈ 9.3).

When is SPF needed in Cayman Islands?

In George Town 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.

Is UV 11+ possible in Cayman Islands?

No — the local maximum is ≈ 9.4. UV 11+ occurs only near the equator, in deserts and high mountains.