UV Index in Rayong, Thailand

Last updated: June 2, 2025

Understanding the UV Index in Rayong, Thailand is essential for safeguarding your health in this tropical paradise. With intense sun exposure typical of the Aw climate zone, paying attention to UV levels can be crucial in preventing sunburn and maintaining overall skin health. As you enjoy outdoor activities from morning to afternoon, be aware that UV levels can soar to a staggering 13 at noon, putting you at high risk. By monitoring the UV Index, you can take proactive steps to protect yourself from harmful rays and enjoy the sun safely.

Hourly UV Index in Rayong

The UV Index showcases a dynamic increase throughout the day, peaking at 13 around 12:00 PM. Starting from a gentle 1 at 7:00 AM, the index steadily climbs as the sun ascends, reaching 6 by 9:00 AM. The intensity becomes palpable by 11:00 AM with a sharp rise to 12, before hitting its zenith at 13 at noon, prompting caution for outdoor activities. As the afternoon unfolds, the levels begin to decline, dipping to 10 by 2:00 PM and gradually falling to 0 by 7:00 PM, signaling safer conditions for evening strolls. It’s essential to stay protected during the midday hours when the sun's rays are most intense!

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.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	3	moderate	30 min
09:00	6	high	25 min
10:00	9	very high	15 min
11:00	12	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	4	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Rayong

The UV Index fluctuates throughout the year, demonstrating particularly high values from February to November, with March to September experiencing the peak levels of 14, categorized as extreme. The high-risk months for UV exposure are from February to October, when the burn time is notably short at just 10 minutes. As a result, it is crucial for both visitors and residents to take precautions during this period. Sunscreen, protective clothing, and hats are essential, and individuals should seek shade during peak sun hours. For the months of January and December, while the UV Index drops to 10, the exposure is still categorized as very high, warranting attention to sun safety. Staying informed and proactive about UV exposure can help mitigate skin damage and enhance outdoor experiences.

Monthly Maximum UV Index for Rayong, Thailand

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Rayong. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Rayong, 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 Rayong UV Index with Other Thailand Cities

The table above highlights how UV exposure in Rayong compares to other major locations across Thailand. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Rayong's solar exposure compared to other cities in Thailand. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mueang Nonthaburi UVI	10	12	14	13	14	13	14	14	13	12	9	8
Samut Prakan UVI	10	12	14	13	14	13	14	14	13	12	9	8
Bangkok UVI	10	12	14	13	14	13	14	14	13	12	9	8
Udon Thani UVI	9	11	13	14	14	13	14	14	14	12	10	9
Chon Buri UVI	10	13	14	14	14	13	14	14	13	13	10	9
Rayong	10	13	14	14	14	13	14	14	14	13	11	10