UV index and sunburn time in Iran
Peak UV index and how quickly unprotected skin burns, for 6 cities in Iran.
| City | Peak UV | Category | Month | Burns after |
|---|---|---|---|---|
| Tehran | 11.8 | Extreme | July | 20 min |
| Mashhad | 11.7 | Extreme | July | 20 min |
| Isfahan | 12.9 | Extreme | July | 18 min |
| Karaj | 11.8 | Extreme | July | 20 min |
| Tabriz | 11.2 | Extreme | July | 21 min |
| Shiraz | 13.7 | Extreme | July | 17 min |
The same UV also drives vitamin D synthesis — and stops entirely for part of the year at higher latitudes. Vitamin D winters in Iran →
Burn times are for skin type III with no sunscreen. How these are calculated