UV Index in Ratchaburi, Thailand

Last updated: July 2, 2025

Understanding the UV Index in Ratchaburi, Thailand, is crucial for safeguarding your skin and overall health. With high UV levels peaking between 12:00 and 14:00, being aware of these fluctuations allows residents and visitors to take proactive measures against sunburn and long-term skin damage. Given Ratchaburi's tropical climate, with its intense sun exposure, knowing when to seek shade or apply sunscreen can significantly reduce the risks associated with UV radiation. Stay informed and enjoy the sun safely!

Hourly UV Index in Ratchaburi

The UV Index chart reveals a dynamic day of sun exposure, starting from a low of 1 at 07:00, where early risers enjoy gentle rays. As the day progresses, the intensity increases sharply, peaking at a striking 14 between 12:00 and 13:00, marking the time for the highest risk of harm from unprotected sun exposure. By 11:00, the index hits 12, indicating serious sunburn risk for those outdoors. The afternoon sees a gradual decline, with values dropping to 8 by 15:00 and continuing down to 0 by 19:00, signaling a safe retreat from the sun’s rays. For those venturing out, sunscreen is highly recommended 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.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	3	moderate	30 min
09:00	5	moderate	30 min
10:00	9	very high	15 min
11:00	12	extreme	10 min
12:00	14	extreme	10 min
13:00	14	extreme	10 min
14:00	11	extreme	10 min
15:00	8	very high	15 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 Ratchaburi

The UV Index exhibits significant seasonal fluctuations, peaking during the summer months. From January to March, the UV levels start at 11 and rise to 14 by the end of April, indicating extreme exposure risk with a burn time of just 10 minutes. This high-risk period continues through the warmer months of May to August, maintaining a UV Index of 14, before slightly decreasing in September and October to 13. The risk remains considerable into November with a drop to 10 and a burn time of 15 minutes, and December follows with a UV Index of 9. Visitors and residents are advised to exercise caution, particularly from March to August, ensuring proper sun protection measures such as wearing sunscreen, protective clothing, and seeking shade to minimize the risk of skin damage.

Monthly Maximum UV Index for Ratchaburi, Thailand

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

The table above highlights how UV exposure in Ratchaburi 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.

Ratchaburi'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
Ratchaburi	11	12	14	14	14	13	14	14	13	13	10	9