Live UV forecast for 125 cities
Czechia stretches from 48.759° to 50.7822° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 7.4 in Breclav (peak in June), while in Usti nad Labem the yearly maximum is only ≈ 7.2.
| Zone | Cities | J | F | M | A | M | J | J | A | S | O | N | D | Peak |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temperate | 125 | 1.9 | 2.9 | 4.4 | 5.9 | 6.8 | 7.3 | 7.1 | 6.3 | 5.2 | 3.8 | 2.6 | 1.8 | 7.3 |
Calculated clear-sky noon peaks at the average latitude of each zone. Real values vary with clouds, altitude and ozone.
Using Prague as a reference: the UV index reaches 6+ in May, June, July and August. 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 ≈ 7.4 — in Breclav around June. Values above this occur only near the equator and in high mountains.
Breclav (peak ≈ 7.4), followed by Brno and Brno stred. The mildest sun is in Usti nad Labem (max ≈ 7.2).
In Prague and similar latitudes the UV reaches 6+ in May, June, July and August: use SPF 30–50+ on sunny days. Protection is advised from UV 3.
No — the local maximum is ≈ 7.4. UV 11+ occurs only near the equator, in deserts and high mountains.