Check the current UV index for any city and learn exactly what each level means for your skin.
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🔍 Check My UV Index →The UV index is a standardized measurement of the strength of ultraviolet radiation from the sun at a particular place and time. It was developed by scientists in the 1990s and adopted worldwide by the World Health Organization to give people a simple, consistent way to gauge their risk of sunburn and skin damage. The scale starts at 0 (no risk, such as at night) and runs upward — typically peaking between 8 and 11 in most populated areas, though it can exceed 12 at high altitudes and near the equator.
The higher the number, the stronger the UV radiation and the faster unprotected skin will burn. A UV index of 3 means moderate exposure where some protection is wise; a UV index of 10 means very high exposure where unprotected skin can burn in as little as 10–15 minutes.
| UV Index | Level | What It Means |
|---|---|---|
| 0–2 | Low | Minimal risk. Safe to be outside. Sunglasses on bright days. |
| 3–5 | Moderate | Seek shade midday. Sunscreen SPF 30+, hat, sunglasses. |
| 6–7 | High | Protection essential. Reduce sun 10am–4pm. Reapply sunscreen. |
| 8–10 | Very High | Extra protection. Unprotected skin burns quickly. Avoid midday sun. |
| 11+ | Extreme | Take all precautions. Skin can burn in minutes. Stay indoors midday. |
Time of day: UV is far stronger near solar noon than in early morning or late afternoon. Season: Summer's higher sun angle drives much higher UV than winter. Latitude: The closer to the equator, the higher the UV. Altitude: UV increases roughly 10% for every 1,000 metres of elevation — mountain towns get intense sun. Cloud cover: Thick cloud reduces UV, but thin or broken cloud lets most of it through. Reflection: Snow, sand, and water bounce UV back up at you, effectively increasing your exposure.
Sun-belt cities can hit extreme UV levels for months at a time. Check today's UV index for these popular cities:
Make checking the UV index part of your morning routine, the same way you check the temperature. If the forecast shows a UV index of 6 or higher, plan to apply sunscreen, wear a hat, and limit your midday sun exposure — regardless of how warm or cool it feels outside. For outdoor workers, athletes, and anyone with fair skin, the UV index is the single most useful number for preventing both short-term sunburn and long-term skin damage.