Cát Bà UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index11.2
- Avg Clouds98%
- Max Temp29.1 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Cát Bà, Vietnam 
will reach a high of 11.2 today. This means a extreme level of sun exposure. See our tips below to stay safe!
Last checked: 2025-09-18
Hourly Forecast Chart
Today's Safety Tips
Extreme danger! Avoid being in the sun, especially during midday. If you go out, cover up with clothing, a hat, and sunglasses, and use plenty of sunscreen.
Cát Bà's UV Index
The UV index in Cát Bà, Vietnam, tends to be high, especially from March to September, often ranging between 7 and 11, indicating strong sun exposure during these months.
Weather Seasons
Seasonal patterns show a hot and humid summer from May to September with heavy rain, while winter from November to February is cooler and drier, making spring and autumn the most pleasant times to visit.
Cát Bà's Climate
Compared to the wider northern Vietnam region, Cát Bà experiences more humidity and frequent rain due to its coastal location. Neighboring countries like Laos and Cambodia typically have drier winters and less humidity overall.
Hourly UV Index Trend
See the UV index hour by hour for Cát Bà. When the level is high, it's smart to find some shade.
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