Siem Reap, Cambodia UV Index in December
The average UV index in Siem Reap, Cambodia in December is about 8.8 (Very High), peaking near 11.4 at midday on clear days. Fair skin (Type II) can burn in roughly 10 minutes without sunscreen. SPF 50+ sunscreen, protective clothing, hat and sunglasses. Minimise midday sun exposure.
What is the UV index in Siem Reap, Cambodia in December?
Average UV
8.8
Very High
Midday Peak
11.4
Clear-sky estimate
Fair Skin Burn Time
10 min
Type II, no sunscreen
How long can you stay in the sun in Siem Reap, Cambodia in December?
| Skin type | Time to first burn | With SPF 30 |
|---|---|---|
| Type 1 | 7 min | up to 210 min |
| Type 2 | 10 min | up to 240 min |
| Type 3 | 17 min | up to 240 min |
| Type 4 | 27 min | up to 240 min |
| Type 5 | 41 min | up to 240 min |
| Type 6 | 61 min | up to 240 min |
Estimates based on Siem Reap, Cambodia's latitude and typical December sun angle. Cloud cover, altitude and reflection from water or sand can raise or lower the real UV. Check the live forecast before long days outside.
Siem Reap, Cambodia UV Index by Month
When is the UV index highest and lowest in Siem Reap, Cambodia?
Highest: April (about 10.1). Lowest: December (about 8.8).
| Month | Average UV | Midday peak | Level | Fair skin burn |
|---|---|---|---|---|
| January | 9 | 11.7 | Very High | 10 min |
| February | 9.4 | 12 | Very High | 10 min |
| March | 9.8 | 12 | Very High | 9 min |
| April | 10.1 | 12 | Very High | 9 min |
| May | 10.1 | 12 | Very High | 9 min |
| June | 10 | 12 | Very High | 9 min |
| July | 10 | 12 | Very High | 9 min |
| August | 10.1 | 12 | Very High | 9 min |
| September | 10 | 12 | Very High | 9 min |
| October | 9.6 | 12 | Very High | 9 min |
| November | 9.1 | 11.8 | Very High | 10 min |
| December | 8.8 | 11.4 | Very High | 10 min |
Common questions about UV in Siem Reap, Cambodia in December
Do you need sunscreen in Siem Reap, Cambodia in December?
Yes. A UV index of 8.8 is Very High, so use SPF 30+ on exposed skin between 10am and 4pm and reapply every two hours.
Can you tan in Siem Reap, Cambodia in December?
Yes, UV of 8.8 is strong enough to tan. Fair skin can burn in about 10 minutes, so build exposure slowly and use sunscreen.
What time of day is UV strongest in Siem Reap, Cambodia?
UV peaks around solar noon, roughly 11am to 2pm local time, when it can reach about 11.4 in December. Mornings and late afternoons are safest.
Is December a good month to visit Siem Reap, Cambodia for the sun?
December averages UV 8.8, compared with a yearly high of 10.1 in April and a low of 8.8 in December. Darker skin (Type VI) can burn in about 61 minutes at this level.