UV Index in Sylhet, Bangladesh

Last updated: August 1, 2025

Understanding the UV Index is crucial for residents of Sylhet, Bangladesh, as it directly impacts sun safety and skin health. With UV levels peaking at 14 during midday, awareness of these measurements can help prevent painful sunburns and long-term skin damage. Sylhet’s tropical climate and high humidity can amplify UV exposure risks, particularly in the mid-morning and early afternoon when people are most active outdoors. By keeping an eye on the UV Index, you can enjoy the beautiful outdoors while protecting your skin from harmful rays.

Hourly UV Index in Sylhet

The UV Index throughout the day paints a clear picture of sun intensity, peaking dramatically between 11:00 AM and 12:00 PM, where it reaches a scorching 14. Early morning starts off mild with a maximum of 2 at 7:00 AM, gradually escalating to a more cautious 4 at 8:00 AM, before the sun strikes hard at 10 around 10:00 AM. By 9:00 AM, the UV climbs to 7, signaling the importance of sun protection as it escalates further to its zenith. In the afternoon, values begin to descend, dropping to 10 at 2:00 PM, and decreasing steadily to 1 by 5:00 PM, indicating a return to safer conditions as the sun sets. With no UV exposure risks by 7:00 PM, this data underscores the critical times for sunscreen application and shade seeking to prevent harm. Stay safe and savvy under the sun!

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	2	low	45 min
08:00	4	moderate	30 min
09:00	7	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	9	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Sylhet

As the seasons change, so too does the UV Index, illustrating significant variations in potential sun exposure. High-risk months are predominantly from March to September, peaking between May and July when the UV Index reaches extreme levels of up to 14, allowing for a burn time as short as 10 minutes. In contrast, the months of January, February, and December exhibit a high risk with burn times of 25 minutes. To ensure safety, both visitors and residents are advised to take precautionary measures during these months, such as wearing protective clothing, applying sunscreen, and seeking shade during peak sun hours. Awareness and preparedness can dramatically reduce the risk of UV-related health issues, making it vital to stay informed about seasonal UV changes.

Monthly Maximum UV Index for Sylhet, Bangladesh

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

The table above highlights how UV exposure in Sylhet compares to other major locations across Bangladesh. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Sylhet's solar exposure compared to other cities in Bangladesh. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Rajshahi UVI	5	7	8	9	10	12	13	13	12	10	7	5
Dhaka UVI	5	7	9	9	12	13	13	13	12	11	7	6
Comilla UVI	6	7	9	10	12	13	13	13	12	10	8	6
Sylhet	6	7	9	10	13	13	14	13	13	10	8	6
Khulna UVI	5	7	9	10	13	13	13	14	12	11	8	6
Chattogram UVI	6	8	10	10	12	13	13	13	12	11	8	6