UV index in Sendai
WHO scale: from 3 up, protect yourself from the sun. Thin cloud blocks little UV.
☀️ UV now · Sendai
0Low
No special protection needed.
- Today's peak
- 4.3
- Protect from
- 10:00
- Until
- 13:00
- High-UV hours
- 4 hours
UV index, next 24 hours
Show data table
| Time | UV index | Rating |
|---|---|---|
| 03:00 | 0 | Low |
| 04:00 | 0 | Low |
| 05:00 | 0 | Low |
| 06:00 | 0 | Low |
| 07:00 | 0.4 | Low |
| 08:00 | 1.5 | Low |
| 09:00 | 2.6 | Moderate |
| 10:00 | 3.7 | Moderate |
| 11:00 | 4.2 | Moderate |
| 12:00 | 4.3 | Moderate |
| 13:00 | 3.8 | Moderate |
| 14:00 | 3 | Moderate |
| 15:00 | 1.9 | Low |
| 16:00 | 0.9 | Low |
| 17:00 | 0.1 | Low |
| 18:00 | 0 | Low |
| 19:00 | 0 | Low |
| 20:00 | 0 | Low |
| 21:00 | 0 | Low |
| 22:00 | 0 | Low |
| 23:00 | 0 | Low |
| 00:00 | 0 | Low |
| 01:00 | 0 | Low |
| 02:00 | 0 | Low |
Peak UV, next 7 days
- Today4.3Moderate
- Monday 26/102.9Moderate
- Tuesday 27/101.9Low
- Wednesday 28/103.4Moderate
- Thursday 29/104Moderate
- Friday 30/102.8Moderate
- Saturday 31/103Moderate
Protecting your skin from UV
- SPF 30+ sunscreenApply 15–20 minutes before going out; reapply every 2 hours and after sweating.
- Wide-brimmed hat, sunglassesShade your face, neck and eyes — UV400 glasses block nearly all UV.
- Long sleeves, dense fabricTightly woven, darker fabric blocks more UV than thin, light fabric.
- Seek midday shadeUV peaks around 10:00–16:00; tip: if your shadow is shorter than you, UV is strong.
UV index FAQ
What UV index is dangerous?
WHO scale: 0–2 low, 3–5 moderate, 6–7 high, 8–10 very high, 11+ extreme. From 3 up, protect yourself; from 8, skin can burn in just 15–20 minutes.
Do I need sunscreen on a cloudy day?
Yes. Thin or broken cloud blocks only a little UV and can even boost it by reflecting off cloud edges. Only very thick cloud cuts it much.
Why is UV higher in the tropics?
The sun is nearly overhead, so UV crosses less atmosphere. In the tropics, midday UV often exceeds 10 all year, especially in summer.