UV Index in Koja Besar, Indonesia

Last updated: May 3, 2025

In Koja Besar, Indonesia, staying informed about the UV Index is crucial for safeguarding your skin against the sun's harmful rays. Understanding the varying UV levels throughout the day not only helps in preventing painful sunburns but also plays a vital role in maintaining long-term skin health, reducing the risk of skin cancer. With a tropical Aw climate, Koja Besar sees significant UV exposure, particularly between 10 AM and 2 PM, when indexes peak at a striking 12. Being aware of these levels is essential for residents and visitors alike to enjoy the sun safely while reaping the benefits of this beautiful locale.

Hourly UV Index in Koja Besar

The UV Index throughout the day exhibits a dramatic rise as the sun reaches its apex. Starting at a minimal 1 at 07:00, the index climbs gradually, hitting 3 by 08:00. The real heat arrives at 09:00, when it surges to 6, peaking at a striking 12 from 11:00 to 12:00—an indication to seek shade and protect your skin. As the afternoon progresses, the index begins to descend, dropping to 10 at 13:00, then gradually decreasing to 4 by 15:00. By late afternoon, the UV intensity diminishes, with values falling to 2 at 16:00, and becoming negligible, hitting 1 by 17:00 before fading into the night with a 0 at 18:00 and beyond. Stay informed and shield yourself from those midday rays!

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	9	very high	15 min
11:00	12	extreme	10 min
12:00	12	extreme	10 min
13:00	10	very high	15 min
14:00	7	high	25 min
15:00	4	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 Koja Besar

Throughout the year, the UV Index remains consistently high, categorized as extreme, with minimal fluctuation in burn time—averaging just 10 minutes of unprotected sun exposure before sunburn occurs. The high-risk months for UV exposure span from January to March, where the index reaches a peak of 16, and persists notably throughout the year, especially in September and November with values of 15. Residents and visitors are strongly advised to take necessary precautions during these months, including wearing protective clothing, using broad-spectrum sunscreen, and seeking shade whenever possible, as even short periods of exposure can lead to serious skin damage.

Monthly Maximum UV Index for Koja Besar, Indonesia

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

The table above highlights how UV exposure in Koja Besar 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.

Koja Besar'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
Koja Besar	15	16	16	14	12	11	12	13	15	15	15	14