UV Index in Si Nakhon, Thailand

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Si Nakhon, Thailand, where the sun’s rays can be particularly intense. With peak UV levels reaching a significant 13 during midday, being aware of these fluctuations helps safeguard against sunburn and long-term skin damage. The tropical climate of Si Nakhon, classified under the Aw climate zone, brings about a high risk of UV exposure, especially throughout the year. By keeping an eye on the UV Index, you can take proactive steps to protect your skin and enjoy the beautiful Thai sunshine safely.

Hourly UV Index in Si Nakhon

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 Si Nakhon

The UV Index experiences significant fluctuations throughout the year, with the most critical months for sun exposure being February through October, where the levels reach extreme values, peaking at 14 in May, July, August, and September. During this period, the burn time is notably short, at just 10 minutes, necessitating vigilant sun protection measures. January and November have a UV Index of 9 and 10 respectively, categorized as very high, allowing for a slightly longer burn time of 15 minutes. December and October see a decrease in UV levels but still fall within a very high range, reminding residents and visitors to remain cautious. It is advisable for everyone to prioritize the use of sunscreen, wear protective clothing, and seek shade, particularly during the high-risk months of late winter through early fall.

Monthly Maximum UV Index for Si Nakhon, Thailand

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

The table above highlights how UV exposure in Si Nakhon 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 Nakhon'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
Si Nakhon	9	11	12	13	14	13	14	14	14	12	10	8
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