UV index in Ostrava
Current UV index, temperature and forecast for Ostrava, Czechia — continuously updated from open weather data.
High
SPF 30+ recommended.
24°C· Updated 12:11 PM
Forecast
Pollen
UV in Ostrava through the year
At 50°N, the midday sun in Ostrava pushes the clear-sky UV index to around 9 (Very high) at its June–July peak. Frequent cloud typically trims the real midday peak to about 7 (High). By midwinter the low sun drops UV to near zero, so sun protection is mainly a spring-to-autumn concern.
The UV scale
- 0–2LowLow UV — enjoy the sun.
- 3–5ModerateUse sunscreen if you're outside for long.
- 6–7HighSPF 30+ recommended.
- 8–10Very highSPF 50+, seek shade 11–15.
- 11+ExtremeAvoid direct sun. Cover your skin.
What does the UV index mean?
The UV index is an international measure of the strength of the sun's ultraviolet radiation. The higher the value, the faster unprotected skin is damaged. From UV 3 upwards, sun protection is recommended. The level in Ostrava varies with the season, the time of day and cloud cover — it peaks around midday in summer.
Frequently asked questions
What is the UV index in Ostrava right now?
Right now the UV index in Ostrava is 6 (High). SPF 30+ recommended.
When is the sun strongest in Ostrava?
UV is strongest around solar noon (roughly 11:00–15:00) in June–July, when the index in Ostrava peaks near 7 (High). Use sun protection during those hours through the high season.
What sun protection do I need?
At UV 1–2, protection is normally not needed. At UV 3–5, sunscreen is recommended. At UV 6–7: SPF 30+, a hat and sunglasses. At UV 8 or higher: SPF 50+, seek shade between 11:00 and 15:00, and cover up.
How often is the UV forecast updated?
Values are fetched continuously from Open-Meteo's open weather data and cached for a few minutes, so the page always shows a current level.
