Live UV forecast for 4 cities
Bhutan stretches from 26.8516° to 27.5914° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 8.7 in Phuntsholing (peak in June), while in Tsirang the yearly maximum is only ≈ 8.7.
| Zone | Cities | J | F | M | A | M | J | J | A | S | O | N | D | Peak |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Subtropical | 4 | 5.1 | 6.1 | 7.3 | 8.2 | 8.6 | 8.7 | 8.7 | 8.4 | 7.8 | 6.8 | 5.8 | 5 | 8.7 |
Calculated clear-sky noon peaks at the average latitude of each zone. Real values vary with clouds, altitude and ozone.
Using Thimphu as a reference: the UV index reaches 6+ in February, 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 ≈ 8.7 — in Phuntsholing around June. Values above this occur only near the equator and in high mountains.
Phuntsholing (peak ≈ 8.7), followed by Punakha and Thimphu. The mildest sun is in Tsirang (max ≈ 8.7).
In Thimphu and similar latitudes the UV reaches 6+ in February, 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 ≈ 8.7. UV 11+ occurs only near the equator, in deserts and high mountains.