UV Index in Si Wilai, Thailand

Last updated: July 2, 2025

In Si Wilai, Thailand, staying aware of the UV Index is crucial for protecting your skin and health. With the region’s warm Aw climate, residents and visitors alike face significant exposure to UV radiation, particularly during midday hours when the index peaks at 14. Understanding UV levels helps prevent sunburn and long-term skin damage, allowing you to enjoy the sun safely. As you plan your outdoor activities, be mindful of these UV readings to ensure a healthy and enjoyable experience under the radiant Thai sun.

Hourly UV Index in Si Wilai

As the sun rises, the UV Index begins to climb, starting at a low 1 at 07:00. By 08:00, it escalates to a moderate 3, signaling the need for some sun protection if you're headed outdoors. The real intensity kicks in as we approach mid-morning, peaking at a remarkable 14 by 12:00. This mid-day surge marks the highest risk for UV exposure, with values hovering around 13 from 11:00 to 13:00. As the afternoon rolls on, a gradual decline occurs, with the index dropping to 7 by 15:00, then further to 4 by 16:00. As evening sets in, the UV Index wanes to a safe 1 by 18:00, fading to 0 by 19:00. This hourly progression highlights the importance of vigilance during the sun's peak hours to stay protected while enjoying the great outdoors!

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	7	high	25 min
10:00	10	very high	15 min
11:00	13	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 Si Wilai

The UV Index exhibits significant seasonal changes, highlighting high-risk months from February to October, where values reach extreme levels (11-14). In January, the UV Index starts at a very high level of 9, with a burn time of 15 minutes. However, by February, it rises to 11, prompting caution as burn time decreases to just 10 minutes. This extreme trend continues through March and July, peaking at 14 in several months. August and September maintain this extreme status, emphasizing the need for protective measures. In October, the index slightly lowers to 12 but remains in the extreme category. As November and December roll in, the index drops to 10 and 8 respectively, returning to the very high category with longer burn times of 15 minutes. Visitors and residents are advised to prioritize sun safety, especially during the peak months, by wearing sunscreen, protective clothing, and seeking shade between 10 AM and 4 PM to minimize UV exposure risks.

Monthly Maximum UV Index for Si Wilai, Thailand

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

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