UV Index in Mersak, Indonesia

Last updated: August 1, 2025

Understanding the UV Index is crucial for residents and visitors in Mersak, Indonesia, where the tropical climate brings both beautiful sunshine and significant UV exposure risks. As the sun reaches its peak between 12 PM and 1 PM, with a maximum UV Index of 13, awareness of the UV levels becomes essential for preventing sunburn and protecting skin health. With typical Af climate, Mersak experiences intense sun, making it vital to stay informed about current UV conditions to enjoy the outdoors safely while minimizing potential harm. Stay protected and make the most of your time in this vibrant locale!

Hourly UV Index in Mersak

The UV Index today exhibits a remarkable ascent, peaking at a staggering 13 between noon and 1 PM. Starting from a mild 1 at 7 AM, the intensity quickly escalates, registering 2 by 8 AM, and reaching 4 by 9 AM. As the sun climbs higher, the index surges to a robust 8 at 10 AM and spikes to its maximum at 11 AM. After this zenith, the UV Index begins to gracefully decline, dropping back to 11 at 2 PM, then tapering to 4 by 4 PM, and finally waning to a gentle 1 at 6 PM. As evening approaches, the UV Index slips below 1 at 7 PM. Make sure to protect your skin between 11 AM and 2 PM when the sun's rays are most potent!

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	2	low	45 min
09:00	5	moderate	30 min
10:00	9	very high	15 min
11:00	13	extreme	10 min
12:00	15	extreme	10 min
13:00	15	extreme	10 min
14:00	12	extreme	10 min
15:00	8	very high	15 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 Mersak

The UV index fluctuates throughout the year, peaking in the early months, with extreme levels consistently recorded from January through May, including a high of 17 in March and April. February offers the highest UV index at 16, maintaining an exposure category of extreme, with recommended burn time of just 10 minutes. As summer approaches, UV levels slightly decrease but remain extreme, with June witnessing a UV index of 14 and gradually tapering to 13 in December. September and October present mild fluctuations, yet still retain a UV index of 15 and 16 respectively. Visitors and residents should exercise caution during these high-risk months, especially from January through May, emphasizing the necessity of protective measures such as sunscreen, clothing, and sunglasses to prevent harmful skin damage.

Monthly Maximum UV Index for Mersak, Indonesia

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

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

Mersak's solar exposure compared to other cities in Indonesia. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Surabaya UVI	13	15	14	12	12	10	11	12	14	13	13	13
Bekasi UVI	14	16	16	14	11	10	10	11	13	15	14	13
Jakarta UVI	14	16	16	14	11	10	10	11	13	15	14	13
Medan UVI	13	15	15	15	14	12	12	13	14	14	13	12
Bandung UVI	15	16	16	15	12	11	11	12	14	15	15	14
Mersak	15	16	17	17	16	14	13	15	15	16	14	13