San Cristóbal de las Casas, Mexico UV Index in January
The average UV index in San Cristóbal de las Casas, Mexico in January is about 8.7 (Very High), peaking near 12 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 San Cristóbal de las Casas, Mexico in January?
Average UV
8.7
Very High
Midday Peak
12
Clear-sky estimate
Fair Skin Burn Time
10 min
Type II, no sunscreen
How long can you stay in the sun in San Cristóbal de las Casas, Mexico in January?
| 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 | 28 min | up to 240 min |
| Type 5 | 41 min | up to 240 min |
| Type 6 | 62 min | up to 240 min |
Estimates based on San Cristóbal de las Casas, Mexico's latitude and typical January 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.
San Cristóbal de las Casas, Mexico UV Index by Month
When is the UV index highest and lowest in San Cristóbal de las Casas, Mexico?
Highest: April (about 10). Lowest: December (about 8.6).
| Month | Average UV | Midday peak | Level | Fair skin burn |
|---|---|---|---|---|
| January | 8.7 | 12 | Very High | 10 min |
| February | 9.2 | 12 | Very High | 10 min |
| March | 9.7 | 12 | Very High | 9 min |
| April | 10 | 12 | Very High | 9 min |
| May | 10 | 12 | Very High | 9 min |
| June | 10 | 12 | Very High | 9 min |
| July | 10 | 12 | Very High | 9 min |
| August | 10 | 12 | Very High | 9 min |
| September | 9.8 | 12 | Very High | 9 min |
| October | 9.4 | 12 | Very High | 10 min |
| November | 8.9 | 12 | Very High | 10 min |
| December | 8.6 | 12 | Very High | 10 min |
Common questions about UV in San Cristóbal de las Casas, Mexico in January
Do you need sunscreen in San Cristóbal de las Casas, Mexico in January?
Yes. A UV index of 8.7 is Very High, so use SPF 30+ on exposed skin between 10am and 4pm and reapply every two hours.
Can you tan in San Cristóbal de las Casas, Mexico in January?
Yes, UV of 8.7 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 San Cristóbal de las Casas, Mexico?
UV peaks around solar noon, roughly 11am to 2pm local time, when it can reach about 12 in January. Mornings and late afternoons are safest.
Is January a good month to visit San Cristóbal de las Casas, Mexico for the sun?
January averages UV 8.7, compared with a yearly high of 10 in April and a low of 8.6 in December. Darker skin (Type VI) can burn in about 62 minutes at this level.