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UV Index in Ushuaia Today
October 8, 2026 · Ushuaia, Argentina
56,956 people
See today's UV index in Ushuaia hour by hour below. The UV index shows how strong the sun's ultraviolet radiation is — the higher the number, the faster skin can burn. Values are calculated for Ushuaia's coordinates and updated daily.
UV rises later today
Hour by hour
Protection windowClear sky
Remember today
- Sunscreen SPF 30+
- Sunglasses
Daylight: sunrise 06:42 – sunset 20:01
Tomorrow: UV 4 at its peak around 13:00
The UV index in Ushuaia peaks at 4 (moderate) around 13:00 today. Sun protection is recommended between 11:27 and 15:00, while the index stays at 3 or above. Tomorrow the index is forecast to peak at 4 around 13:00.
UV index in Ushuaia hour by hour
| Time | UV index | Level |
|---|---|---|
| 06:00 | 0 | Low |
| 07:00 | 0.1 | Low |
| 08:00 | 0.3 | Low |
| 09:00 | 0.8 | Low |
| 10:00 | 1.6 | Low |
| 11:00 | 2.6 | Low |
| 12:00 | 3.5 | Moderate |
| 13:00 | 3.9 | Moderate |
| 14:00 | 3.7 | Moderate |
| 15:00 | 3 | Moderate |
| 16:00 | 2.1 | Low |
| 17:00 | 1.2 | Low |
| 18:00 | 0.5 | Low |
| 19:00 | 0.2 | Low |
| 20:00 | 0 | Low |
| 21:00 | 0 | Low |
UV index in Ushuaia
Ushuaia lies at 55°S. The midday sun reaches 41.1° above the horizon in Ushuaia today, against a yearly ceiling of 58.6°. Elevation is what sets the ceiling for UV, and over Ushuaia it is moderate, so the index peaks around midsummer and stays low all winter.
What is the UV index?
The UV index is an international scale describing the strength of the sun's ultraviolet radiation at ground level. It starts at 0 and is effectively open-ended — at mid-latitudes it rarely exceeds 8, while in the tropics and high in the mountains it can pass 11. The higher the number, the less time it takes to get sunburnt.
The UV index depends mainly on how high the sun is in the sky. That is why it peaks around solar noon and is greatest in summer near the longest day of the year. Clouds, ozone, altitude and reflection from snow or water also affect the value.
The WHO UV scale
| UV index | Level | Recommendation |
|---|---|---|
| 0–2 | Low | No special protection needed. |
| 3–5 | Moderate | Use sunscreen (SPF 30+), seek shade around midday. |
| 6–7 | High | Sunscreen, hat and sunglasses. Avoid the sun 12:00–15:00. |
| 8–10 | Very high | Extra protection. Limit midday sun exposure. |
| 11+ | Extreme | Avoid the sun at midday. Full protection required. |
See also sunrise, sunset and daylight hours in Ushuaia.