UV index in Perth in June
In June, the UV index in Perth typically peaks around 3.3 at midday — moderate on the WHO scale — with individual days reaching 4 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 3.3:
| Skin type | Time to burn |
|---|---|
| I — Very fair | ~40 min |
| II — Fair | ~51 min |
| III — Medium | ~1h 10m |
| IV — Olive | ~1h 30m |
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
- Pack SPF 30+ and use it for extended midday time outside — fair skin can burn in under an hour at these levels.
- Mornings and late afternoons are generally low-risk without protection.
- Sunglasses are worth it: cumulative UV drives cataracts even at moderate levels.
Planning a trip? Check the live UV index in Perth closer to your dates — day-to-day cloud cover moves the real number around this average.
Perth's UV year at a glance
| Month | Typical midday peak | Level |
|---|---|---|
| January | 9.2 | Very high |
| February | 8.4 | Very high |
| March | 7.5 | High |
| April | 5.7 | Moderate |
| May | 4.1 | Moderate |
| June | 3.3 | Moderate |
| July | 3.5 | Moderate |
| August | 4.4 | Moderate |
| September | 6.2 | High |
| October | 7.6 | High |
| November | 8.5 | Very high |
| December | 9.3 | Very high |
The strongest month is December (typical peak 9.3); the gentlest is June (typical peak 3.3).
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