UV Index in Ko Si Chang, Thailand

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Ko Si Chang, Thailand, where the sun shines brightly throughout the year. By staying informed about UV levels, you can take essential steps to prevent sunburn and protect your skin health. With a tropical Aw climate that often sees soaring UV indexes, particularly during midday, it’s vital to recognize that levels can reach a staggering 13—indicating extreme exposure risk. Equip yourself with knowledge, plan your sun activities wisely, and enjoy the beauty of this island while safeguarding your skin!

Hourly UV Index in Ko Si Chang

As the sun climbs higher, the UV Index reaches its peak intensity around 12:00 PM, soaring to a striking 13—a clear signal for outdoor enthusiasts to take precautions. The morning hours start gently, with a low of 1 at 07:00 AM, gradually escalating to 6 by 09:00 AM and hitting 9 at 10:00 AM. By 11:00 AM, the sun begins to assert itself with a 12. However, as the afternoon progresses, the UV intensity starts to wane, dropping to 10 at 2:00 PM, and tapering off to a mere 2 by 5:00 PM. As daylight diminishes, the UV Index dwindles to 0 by 7:00 PM, inviting a much-needed respite from the sun’s relentless rays. Always be vigilant and protect your skin during those 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.
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	13	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 Ko Si Chang

The UV Index experiences notable fluctuations throughout the year, peaking in the late spring and summer months. January starts with a UV Index of 10 (very high), but this escalates dramatically to 14 (extreme) from March through August, indicating a significant risk for skin damage with a burn time of just 10 minutes. February and November also present high risks, with UV Indexes of 13 (extreme) and 10 (very high), respectively. As the year progresses into the fall, the UV exposure remains concerning, particularly in September and October with a consistent UV Index of 13. Given this data, it is crucial for visitors and residents to exercise caution during high-risk months (February to October), by minimizing sun exposure, seeking shade, wearing protective clothing, and applying sunscreen, especially during peak hours.

Monthly Maximum UV Index for Ko Si Chang, Thailand

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Ko Si Chang. 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 Ko Si Chang, 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 Ko Si Chang UV Index with Other Thailand Cities

The table above highlights how UV exposure in Ko Si Chang 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.

Ko Si Chang'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
Ko Si Chang	10	13	14	14	14	13	14	14	13	13	10	9
Chon Buri UVI	10	13	14	14	14	13	14	14	13	13	10	9