UV Index in Ko Si Chang, Thailand

Last updated: July 2, 2025

Understanding the UV Index in Ko Si Chang, Thailand is crucial for anyone looking to enjoy the sun safely. With its tropical climate and high UV exposure, it's essential to be aware of UV levels to prevent sunburn and protect skin health. The UV Index can reach a maximum of 14 during peak hours, indicating extreme risk of harm from unprotected sun exposure. By staying informed about daily UV trends, residents and visitors can enjoy the stunning beaches of Ko Si Chang while safeguarding their skin from harmful effects.

Hourly UV Index in Ko Si Chang

As the sun rises, the UV Index begins its ascent, starting from a gentle 1 at 07:00. By 08:00, it climbs to 3, signaling the need for increased sun protection. The intensity peaks dramatically at 12:00 with a scorching 14, marking the most hazardous sun exposure period of the day. Just before noon, at 11:00, the UV Index hits 12, a warning to stay in the shade. By 14:00, it begins its descent, dropping to 11 and continuing down to a mild 4 by 16:00. The evening brings relief as the index falls to 0 by 19:00, allowing for a safe outdoor experience as the sun sets. Stay aware and protect your skin during those peak hours to enjoy your day safely!

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	14	extreme	10 min
13:00	13	extreme	10 min
14:00	11	extreme	10 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