UV Index in Ratahan, Indonesia

Last updated: August 1, 2025

In Ratahan, Indonesia, understanding the UV Index is essential for protecting your skin and overall health. With the region's tropical climate, residents and visitors face significant risks from UV exposure, particularly during the peak hours when the index reaches alarming levels—up to 13 at noon. Awareness of UV levels is crucial not only for preventing sunburn but also for lowering the risk of long-term skin issues. By being informed about the changing UV Index throughout the day, you can take necessary precautions to enjoy the sun safely in this beautiful locale.

Hourly UV Index in Ratahan

The UV Index data reveals a dramatic transformation throughout the day. Early in the morning, at 07:00, the UV Index starts at a minimal 1, but by 09:00, it skyrockets to 7, indicating a rise in sun intensity. The peak occurs between 11:00 and 12:00, where it reaches its zenith at an impressive 13, showcasing the potential for skin damage without protection. As the afternoon progresses, the index gradually declines, with values dropping to 4 by 15:00 and further dwindling to a 0 by 19:00. This pattern highlights the importance of sun safety during the midday hours when UV radiation is most potent, urging us to embrace the shade and apply sunscreen accordingly.

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	8	very high	15 min
10:00	11	extreme	10 min
11:00	14	extreme	10 min
12:00	14	extreme	10 min
13:00	12	extreme	10 min
14:00	9	very high	15 min
15:00	5	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	0	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Ratahan

The UV index data reveals extremely high UV levels throughout most of the year, particularly from January to May, where values remain consistently high at 15-16, indicating a 10-minute burn time. March through May also sees persistently high readings, suggesting these months are particularly at risk. However, even in June to November, the UV index stays robustly high, tapering only slightly. With October and November still showing UV indices of 15 and 14 respectively, residents and visitors should take precautions year-round. It is crucial to use adequate sun protection, such as wearing sunscreen, sunglasses, and protective clothing, especially during peak sun hours. Always remain vigilant about sun safety, as the threat of rapid skin damage is significant at these levels.

Monthly Maximum UV Index for Ratahan, Indonesia

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

The table above highlights how UV exposure in Ratahan 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.

Ratahan'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
Ratahan	15	16	16	16	15	12	13	14	15	15	14	13