Grand Cayman, Cayman Islands UV Index in January
The average UV index in Grand Cayman, Cayman Islands in January is about 8.5 (Very High), peaking near 11.1 at midday on clear days. Fair skin (Type II) can burn in roughly 11 minutes without sunscreen. SPF 50+ sunscreen, protective clothing, hat and sunglasses. Minimise midday sun exposure.
What is the UV index in Grand Cayman, Cayman Islands in January?
Average UV
8.5
Very High
Midday Peak
11.1
Clear-sky estimate
Fair Skin Burn Time
11 min
Type II, no sunscreen
How long can you stay in the sun in Grand Cayman, Cayman Islands in January?
| Skin type | Time to first burn | With SPF 30 |
|---|---|---|
| Type 1 | 7 min | up to 210 min |
| Type 2 | 11 min | up to 240 min |
| Type 3 | 18 min | up to 240 min |
| Type 4 | 28 min | up to 240 min |
| Type 5 | 42 min | up to 240 min |
| Type 6 | 64 min | up to 240 min |
Estimates based on Grand Cayman, Cayman Islands's latitude and typical January sun angle. Cloud cover, altitude and reflection from water or sand can raise or lower the real UV. Check the live forecast before long days outside.
Grand Cayman, Cayman Islands UV Index by Month
When is the UV index highest and lowest in Grand Cayman, Cayman Islands?
Highest: May (about 10). Lowest: December (about 8.3).
| Month | Average UV | Midday peak | Level | Fair skin burn |
|---|---|---|---|---|
| January | 8.5 | 11.1 | Very High | 11 min |
| February | 9 | 11.7 | Very High | 10 min |
| March | 9.6 | 12 | Very High | 9 min |
| April | 9.9 | 12 | Very High | 9 min |
| May | 10 | 12 | Very High | 9 min |
| June | 10 | 12 | Very High | 9 min |
| July | 10 | 12 | Very High | 9 min |
| August | 10 | 12 | Very High | 9 min |
| September | 9.7 | 12 | Very High | 9 min |
| October | 9.2 | 12 | Very High | 10 min |
| November | 8.7 | 11.3 | Very High | 10 min |
| December | 8.3 | 10.8 | Very High | 11 min |
Common questions about UV in Grand Cayman, Cayman Islands in January
Do you need sunscreen in Grand Cayman, Cayman Islands in January?
Yes. A UV index of 8.5 is Very High, so use SPF 30+ on exposed skin between 10am and 4pm and reapply every two hours.
Can you tan in Grand Cayman, Cayman Islands in January?
Yes, UV of 8.5 is strong enough to tan. Fair skin can burn in about 11 minutes, so build exposure slowly and use sunscreen.
What time of day is UV strongest in Grand Cayman, Cayman Islands?
UV peaks around solar noon, roughly 11am to 2pm local time, when it can reach about 11.1 in January. Mornings and late afternoons are safest.
Is January a good month to visit Grand Cayman, Cayman Islands for the sun?
January averages UV 8.5, compared with a yearly high of 10 in May and a low of 8.3 in December. Darker skin (Type VI) can burn in about 64 minutes at this level.