UV Index in Santo Tomas La Union, Guatemala

Last updated: August 1, 2025

Understanding the UV Index is essential for residents and visitors of Santo Tomás La Unión, Guatemala, especially in its Cwb climate zone, where diverse weather patterns can lead to varying levels of UV exposure. With UV levels peaking around noon at a high of 14, it’s crucial to be aware of these indicators to prevent sunburn and protect skin health. Knowledge of UV levels helps individuals make informed decisions about sun safety, ensuring enjoyable outdoor activities without the risk of harmful effects from overexposure to the sun. Stay vigilant and informed—your skin will thank you!

Hourly UV Index in Santo Tomas La Union

The UV Index throughout the day presents a clear picture of sun exposure risks. Starting at 07:00, the index is a mere 1, suitable for most outdoor activities. However, by 08:00, it rises to 3, indicating a need for some sun protection. The peak occurs at 12:00 with a striking 14, signaling extreme exposure levels and a critical time to seek shade. After this zenith, the index gradually declines, dipping to 4 by 16:00 before falling back to 1 by 17:00. As the day winds down, the UV Index drops to 0 by 19:00, marking a safe return for evening outdoor plans. Be sun-smart and take necessary precautions during peak hours!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
TimeUVICategoryTime to Burn
07:001low45 min
08:003moderate30 min
09:006high25 min
10:0010very high15 min
11:0013extreme10 min
12:0014extreme10 min
13:0013extreme10 min
14:0010very high15 min
15:007high25 min
16:003moderate30 min
17:001low45 min
18:001low45 min
19:000low45 min

Monthly UV Index Trends in Santo Tomas La Union

The UV Index in the region shows a marked seasonal increase from January through April, peaking at 15 in April, indicating an extreme exposure category with a burn time of only 10 minutes. From May to October, the index remains high at 14, continuing the extreme exposure risk. High-risk months for UV exposure are March through October, where visitors and residents should take precautionary measures as all fall within the extreme category. In November, the UV Index drops slightly to 11, and to 9 in December, categorizing the exposure as very high but with a slightly longer burn time of 15 minutes. It is strongly advised that individuals employ protective measures, such as wearing sunscreen, protective clothing, and seeking shade, particularly during these high-risk months to minimize the risk of skin damage.

Monthly Maximum UV Index for Santo Tomas La Union, Guatemala

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Santo Tomas La Union. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec11131415141414141413119
Data source: Statistical UV Index data for Santo Tomas La Union, based on information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

Compare Santo Tomas La Union UV Index with Other Guatemala Cities

The table above highlights how UV exposure in Santo Tomas La Union compares to other major locations across Guatemala. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.
Santo Tomas La Union's solar exposure compared to other cities in Guatemala. Generated using Copernicus Atmosphere Monitoring Service information.
 JanFebMarAprMayJunJulAugSepOctNovDec
Petapa UVI111314151414141414131010
Villa Nueva UVI111314151414141414131010
Santo Tomas La Union11131415141414141413119
Mixco UVI111315151414141414131110
Guatemala City UVI111315151414141414131110
San Juan Sacatepequez UVI111315151414151414131110