UV Index in Si Thep, Thailand

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors of Si Thep, Thailand, where the tropical Aw climate brings with it a significant risk of UV exposure. With UV levels peaking dramatically throughout the day—reaching as high as 14 around noon—being aware of these fluctuations can help prevent sunburn and safeguard skin health. By keeping an eye on the UV Index, you can take proactive measures against harmful sun exposure, ensuring that your time in the sun is both enjoyable and safe. Embrace the beautiful weather in Si Thep, but remember to prioritize your skin's well-being!

Hourly UV Index in Si Thep

As the sun rises, the UV Index begins its climb, starting at a mild 1 at 07:00. By 08:00, it reaches 3, signaling a gradual increase in sun intensity. The real surge happens between 09:00 and 13:00, peaking at a blistering 14 at both 12:00 and 13:00, urging outdoor enthusiasts to seek shade and apply sunscreen. As the afternoon wanes, there's a rapid decline; by 15:00, it drops to 7, and by 18:00, it plummets to 1, finally resting at 0 by 19:00. This dynamic pattern underscores the importance of staying vigilant during peak hours to safeguard against harmful UV exposure while enjoying the bright day!

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	13	extreme	10 min
12:00	14	extreme	10 min
13:00	14	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 Si Thep

The UV Index varies significantly throughout the year, peaking during the spring and summer months. February through September are identified as high-risk months, where the UV Index reaches levels categorized as extreme (12-14), with burn times as short as 10 minutes. January, November, and December show a slight decrease, with UV levels still classified as very high (9-10) and burn times extending to 15 minutes. Visitors and residents are strongly advised to take precautions during these high-risk months by seeking shade, wearing protective clothing, and using broad-spectrum sunscreen to minimize the risk of UV exposure and potential sunburn.

Monthly Maximum UV Index for Si Thep, Thailand

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

The table above highlights how UV exposure in Si Thep 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.

Si Thep'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
Si Thep	9	12	13	14	14	13	14	14	13	13	10	9
Chon Buri UVI	10	13	14	14	14	13	14	14	13	13	10	9