UV Index in Phra Nakhon Si Ayutthaya, Thailand

Last updated: June 2, 2025

Understanding the UV Index is crucial for everyone living in or visiting Phra Nakhon Si Ayutthaya, Thailand. With its tropical climate, this historic city experiences high UV levels, particularly during midday when the index can soar to a staggering 13. Awareness of UV levels is essential for sunburn prevention and maintaining long-term skin health, especially as exposure risks can increase dramatically in just a few hours. By checking the UV Index, you can make informed decisions about sun safety and enjoy all that Ayutthaya has to offer while protecting your skin from harmful rays.

Hourly UV Index in Phra Nakhon Si Ayutthaya

The UV Index begins at a mild level of 1 at 07:00, but as the sun climbs higher, it swiftly escalates. By 10:00, it peaks at a critical 9, reaching a maximum of 13 at 12:00, indicating that protective measures are essential. After noon, the index gradually declines, tapering to 7 by 15:00, before dipping to a 2 by 17:00, and finally settling at 0 by 19:00 as the sun sets. This data highlights the importance of sun safety during the hours when UV exposure is at its highest, particularly around midday.

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	11	extreme	10 min
12:00	13	extreme	10 min
13:00	12	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 Phra Nakhon Si Ayutthaya

The UV Index experiences significant seasonal changes, peaking during the warmer months. January begins with a UV Index of 9, categorized as very high, with a burn time of just 15 minutes. As we move into February and March, the Index escalates to 12 and 13, tipping into the extreme category, where careful sun protection is essential. From April to August, the UV Index consistently remains at 13 to 14, emphasizing the need for aggressive sun safety measures with a burn time of only 10 minutes. The Index begins to decline in September and October but stays in the extreme range of 12 to 13. High-risk months for UV exposure are predominantly between February and August, urging both residents and visitors to prioritize sun protection—such as wearing sunscreen, hats, and protective clothing—during these critical times. The lower UV levels in November and December still warrant attention, as they feature a 10 and 9 UV Index, respectively, reminding us that skin protection is important year-round.

Monthly Maximum UV Index for Phra Nakhon Si Ayutthaya, Thailand

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

The table above highlights how UV exposure in Phra Nakhon Si Ayutthaya 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.

Phra Nakhon Si Ayutthaya'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
Phra Nakhon Si Ayutthaya	9	12	13	14	13	13	13	14	13	12	10	9
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