Cayenne, French Guiana UV Index in August
The average UV index in Cayenne, French Guiana in August is about 12 (Extreme), peaking near 12 at midday on clear days. Fair skin (Type II) can burn in roughly 8 minutes without sunscreen. Avoid direct sun between 10am and 4pm. SPF 50+, full protective clothing, hat and sunglasses are essential.
What is the UV index in Cayenne, French Guiana in August?
Average UV
12
Extreme
Midday Peak
12
Clear-sky estimate
Fair Skin Burn Time
8 min
Type II, no sunscreen
How long can you stay in the sun in Cayenne, French Guiana in August?
| Skin type | Time to first burn | With SPF 30 |
|---|---|---|
| Type 1 | 5 min | up to 150 min |
| Type 2 | 8 min | up to 240 min |
| Type 3 | 13 min | up to 240 min |
| Type 4 | 20 min | up to 240 min |
| Type 5 | 30 min | up to 240 min |
| Type 6 | 45 min | up to 240 min |
Estimates based on Cayenne, French Guiana's latitude and typical August 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.
Cayenne, French Guiana UV Index by Month
When is the UV index highest and lowest in Cayenne, French Guiana?
Highest: February (about 12). Lowest: December (about 11.5).
| Month | Average UV | Midday peak | Level | Fair skin burn |
|---|---|---|---|---|
| January | 11.6 | 12 | Extreme | 8 min |
| February | 12 | 12 | Extreme | 8 min |
| March | 12 | 12 | Extreme | 8 min |
| April | 12 | 12 | Extreme | 8 min |
| May | 12 | 12 | Extreme | 8 min |
| June | 12 | 12 | Extreme | 8 min |
| July | 12 | 12 | Extreme | 8 min |
| August | 12 | 12 | Extreme | 8 min |
| September | 12 | 12 | Extreme | 8 min |
| October | 12 | 12 | Extreme | 8 min |
| November | 11.7 | 12 | Extreme | 8 min |
| December | 11.5 | 12 | Extreme | 8 min |
Common questions about UV in Cayenne, French Guiana in August
Do you need sunscreen in Cayenne, French Guiana in August?
Yes. A UV index of 12 is Extreme, so use SPF 30+ on exposed skin between 10am and 4pm and reapply every two hours.
Can you tan in Cayenne, French Guiana in August?
Yes, UV of 12 is strong enough to tan. Fair skin can burn in about 8 minutes, so build exposure slowly and use sunscreen.
What time of day is UV strongest in Cayenne, French Guiana?
UV peaks around solar noon, roughly 11am to 2pm local time, when it can reach about 12 in August. Mornings and late afternoons are safest.
Is August a good month to visit Cayenne, French Guiana for the sun?
August averages UV 12, compared with a yearly high of 12 in February and a low of 11.5 in December. Darker skin (Type VI) can burn in about 45 minutes at this level.