UV Index in Si Chiang Mai, Thailand

Last updated: June 2, 2025

Understanding the UV Index in Si Chiang Mai, Thailand is crucial for safeguarding your skin and overall health. As the sun-soaked climate of this region can lead to high UV exposure risks—particularly during peak hours—being informed enables effective sunburn prevention and promotes long-term skin health. With UV levels reaching a maximum of 13 around midday, awareness is not just beneficial; it's essential for enjoying the vibrant outdoors safely. Stay protected and make the most of your time under the sun in this beautiful locale!

Hourly UV Index in Si Chiang Mai

The UV Index throughout the day reveals a dynamic pattern of solar intensity. Starting from a gentle 1 at 7:00 AM, the index escalates swiftly, peaking at a striking 13 by noon. This midday surge signals the need for sun protection as the index reaches its highest point at 12:00 PM, hovering around 12 to 13 until 1:00 PM. As the afternoon progresses, the intensity begins to wane, dropping to 10 by 2:00 PM and then descending steadily to 7 at 3:00 PM, 4 at 4:00 PM, and eventually dwindling to a safe 1 by 6:00 PM. After 7:00 PM, the UV level flatlines at 0, marking the end of peak sun exposure. Remember, during those peak hours, especially from 10 AM to 2 PM, it's vital to prioritize skin safety!

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	10	very high	15 min
11:00	12	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 Si Chiang Mai

The UV Index shows significant seasonal changes, peaking from March to October, where the index frequently hits 14, indicating an extreme exposure category and a burn time of just 10 minutes. The high-risk months for UV exposure are February through October, where residents and visitors should exercise caution. During these months, it is essential to wear broad-spectrum sunscreen, protective clothing, and sunglasses to shield against harmful UV rays. While January, November, and December have a comparatively lower risk with a UV Index of 9 and 8 (very high exposure category), it remains important to stay vigilant, as burn times can still be as brief as 15 minutes.

Monthly Maximum UV Index for Si Chiang Mai, Thailand

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

The table above highlights how UV exposure in Si Chiang Mai 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 Chiang Mai'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 Chiang Mai	9	11	13	14	14	13	14	14	14	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