UV Index
Sun protection in Iceland — even on cold days
0–2
Low
No protection needed
3–5
Moderate
Sun protection if outside long
6–7
High
Sunscreen, hat, sunglasses
8–10
Very high
Avoid sun 11 AM–3 PM
11+
Extreme
Full protection, stay inside
Iceland is near the Arctic — UV can be high in summer, especially on snow-covered areas that reflect. Aurora clouds can increase exposure.
Peak hours
UV is highest between 11 AM and 3 PM. During midnight sun months (June–July), sunlight is 24 hours — be aware.