Loreto, Mexico UV Index in September
The average UV index in Loreto, Mexico in September is about 8.5 (Very High), peaking near 12 at midday on clear days. Fair skin (Type II) can burn in roughly 11 minutes without sunscreen. SPF 50+ sunscreen, protective clothing, hat and sunglasses. Minimise midday sun exposure.
What is the UV index in Loreto, Mexico in September?
Average UV
8.5
Very High
Midday Peak
12
Clear-sky estimate
Fair Skin Burn Time
11 min
Type II, no sunscreen
How long can you stay in the sun in Loreto, Mexico in September?
| Skin type | Time to first burn | With SPF 30 |
|---|---|---|
| Type 1 | 7 min | up to 210 min |
| Type 2 | 11 min | up to 240 min |
| Type 3 | 18 min | up to 240 min |
| Type 4 | 28 min | up to 240 min |
| Type 5 | 42 min | up to 240 min |
| Type 6 | 64 min | up to 240 min |
Estimates based on Loreto, Mexico's latitude and typical September 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.
When is the UV index highest and lowest in Loreto, Mexico?
Highest: May (about 9). Lowest: December (about 7).
| Month | Average UV | Midday peak | Level | Fair skin burn |
|---|---|---|---|---|
| January | 7.1 | 10.3 | High | 13 min |
| February | 7.7 | 11.1 | High | 12 min |
| March | 8.3 | 12 | Very High | 11 min |
| April | 8.8 | 12 | Very High | 10 min |
| May | 9 | 12 | Very High | 10 min |
| June | 9 | 12 | Very High | 10 min |
| July | 9 | 12 | Very High | 10 min |
| August | 8.9 | 12 | Very High | 10 min |
| September | 8.5 | 12 | Very High | 11 min |
| October | 8 | 11.6 | Very High | 11 min |
| November | 7.3 | 10.5 | High | 12 min |
| December | 7 | 10.1 | High | 13 min |
Common questions about UV in Loreto, Mexico in September
Do you need sunscreen in Loreto, Mexico in September?
Yes. A UV index of 8.5 is Very High, so use SPF 30+ on exposed skin between 10am and 4pm and reapply every two hours.
Can you tan in Loreto, Mexico in September?
Yes, UV of 8.5 is strong enough to tan. Fair skin can burn in about 11 minutes, so build exposure slowly and use sunscreen.
What time of day is UV strongest in Loreto, Mexico?
UV peaks around solar noon, roughly 11am to 2pm local time, when it can reach about 12 in September. Mornings and late afternoons are safest.
Is September a good month to visit Loreto, Mexico for the sun?
September averages UV 8.5, compared with a yearly high of 9 in May and a low of 7 in December. Darker skin (Type VI) can burn in about 64 minutes at this level.