UV Index Calculator
UV Index Risk Assessment
Formula
Risk: Low (1-2), Moderate (3-5), High (6-7), Very High (8-10), Extreme (11+) | Safe exposure ≈ MED / (UV × 2.5) minutes
Frequently Asked Questions
What UV index is dangerous?
UV Index 6–7 is considered high risk. UV 8–10 is very high risk, and UV 11+ is extreme. Even moderate UV (3–5) can cause sunburn with prolonged exposure, especially for fair-skinned individuals.
What does UV index mean?
The UV index is a measure of the strength of ultraviolet radiation from the sun at a particular place and time. Higher values mean greater risk of skin and eye damage. It ranges from 0 (nighttime) to 11+ (extreme).
When is UV index highest?
UV is typically highest between 10am and 4pm, especially from late spring to early fall. UV is stronger at higher altitudes, near the equator, and around reflective surfaces like water, sand, and snow.
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