Live UV forecast for 2,107 cities
China stretches from 18.2544° to 52.9906° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 9.4 in Baocheng (peak in May), while in Xilinji the yearly maximum is only ≈ 7.
| Zone | Cities | J | F | M | A | M | J | J | A | S | O | N | D | Peak |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tropical | 175 | 6.2 | 7.1 | 8.1 | 8.9 | 9.1 | 9.1 | 9.1 | 9 | 8.6 | 7.8 | 6.8 | 6.1 | 9.1 |
| Subtropical | 1286 | 4.5 | 5.5 | 6.7 | 7.8 | 8.2 | 8.4 | 8.4 | 8 | 7.4 | 6.3 | 5.2 | 4.4 | 8.4 |
| Temperate | 646 | 3.2 | 4.2 | 5.6 | 6.9 | 7.7 | 8 | 7.9 | 7.3 | 6.4 | 5.1 | 3.9 | 3.1 | 8 |
Calculated clear-sky noon peaks at the average latitude of each zone. Real values vary with clouds, altitude and ozone.
Using Shanghai as a reference: the UV index reaches 6+ in March, April, May, June, July, August, September and October. In the sunniest zones (see table) SPF 30–50+ is needed almost year-round; in the mildest — only in late spring and summer.
The calculated clear-sky maximum is ≈ 9.4 — in Baocheng around May. Values above this occur only near the equator and in high mountains.
Baocheng (peak ≈ 9.4), followed by Basuo and Qionghai. The mildest sun is in Xilinji (max ≈ 7).
In Shanghai and similar latitudes the UV reaches 6+ in March, April, May, June, July, August, September and October: use SPF 30–50+ on sunny days. Protection is advised from UV 3.
No — the local maximum is ≈ 9.4. UV 11+ occurs only near the equator, in deserts and high mountains.