UV index in Hong Kong in April
In April, the UV index in Hong Kong typically peaks around 7.7 at midday — high on the WHO scale — with individual days reaching 9 in recent years. Sun protection is needed around the middle of the day.
How fast would you burn?
Estimated time to sunburn in unprotected midday sun at UV 7.7:
| Skin type | Time to burn |
|---|---|
| I — Very fair | ~17 min |
| II — Fair | ~22 min |
| III — Medium | ~30 min |
| IV — Olive | ~39 min |
Estimates from typical minimal erythemal doses — see methodology. Darker types (V–VI) burn slower still. Reflection off water or sand shortens all of these.
What to do about it
- SPF 30–50 every day, applied before you go out and reapplied every 2 hours.
- Plan beach, hiking, or long outdoor time before 11am or after 3pm when you can.
- A hat and sunglasses stop the exposure your sunscreen misses — face and eyes take the worst of it.
Planning a trip? Check the live UV index in Hong Kong closer to your dates — day-to-day cloud cover moves the real number around this average.
Hong Kong's UV year at a glance
| Month | Typical midday peak | Level |
|---|---|---|
| January | 5.2 | Moderate |
| February | 5.4 | Moderate |
| March | 6.2 | High |
| April | 7.7 | High |
| May | 7.3 | High |
| June | 7.9 | High |
| July | 7.9 | High |
| August | 7.4 | High |
| September | 7.3 | High |
| October | 6.5 | High |
| November | 5.3 | Moderate |
| December | 4.8 | Moderate |
The strongest month is June (typical peak 7.9); the gentlest is December (typical peak 4.8).
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