UV Index in Sleman, Indonesia

Last updated: June 2, 2025

In Sleman, Indonesia, being mindful of the UV Index is crucial for maintaining your skin health and preventing sunburn. With its tropical climate, Sleman experiences high UV levels, particularly from 10:00 AM to 2:00 PM, when UV readings can peak as high as 10, indicating a significant risk for skin damage. Understanding these UV levels not only empowers you to take protective measures—like wearing sunscreen and protective clothing—but also helps you enjoy the beautiful outdoors safely. Stay informed and safeguard your skin in this vibrant region where sun exposure is a daily reality!

Hourly UV Index in Sleman

The UV Index for the day shows a steady climb as the sun rises, hitting its peak between 11:00 AM and 12:00 PM with a maximum value of 10. During this peak period, caution is advised as UV radiation can be extremely harmful. As the afternoon progresses, the index begins a gradual decline, dropping to 8 by 1:00 PM and tapering off to 3 at 3:00 PM. As the sun sets, the UV Index decreases further, reaching 0 by 6:00 PM and remaining there for the evening, signaling a safe time to enjoy outdoor activities without the risk of overexposure. Remember to wear sunscreen and protective clothing during the peak hours!

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	10	very high	15 min
12:00	10	very high	15 min
13:00	8	very high	15 min
14:00	6	high	25 min
15:00	3	moderate	30 min
16:00	1	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 Sleman

During the year, UV levels are notably high, particularly from January to March and then again in September and October, where the UV Index reaches extreme levels of 15 to 16. The highest risk months for UV exposure are therefore deemed to be February, March, and October, where the UV Index consistently hits 16. Even during the summer months, such as June and July, the exposure category remains high, with burn times dropping to about 10-15 minutes depending on the month. As such, it is essential for both visitors and residents to take precautionary measures during these high-risk periods. Wearing sunscreen with a high SPF, donning protective clothing, and seeking shade during peak hours are highly advised to lower the risk of overexposure and skin damage. Stay vigilant and safe in the sun!

Monthly Maximum UV Index for Sleman, Indonesia

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

The table above highlights how UV exposure in Sleman 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.

Sleman'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
Sleman	15	16	16	14	13	10	11	13	15	16	15	14