UV Index in Siwa, Indonesia

Last updated: June 2, 2025

Understanding the UV Index is crucial for residents and visitors of Siwa, Indonesia, where the tropical climate can expose you to significant ultraviolet radiation. Knowledge of UV levels helps prevent sunburn and protects your long-term skin health, allowing you to enjoy the vibrant outdoor life without worry. With typical UV exposure peaking between 11:00 AM and 1:00 PM at extraordinarily high levels, awareness of these risks is essential to safeguard your skin in this beautiful region. Stay informed, protect yourself, and enjoy the sunny days that Siwa has to offer!

Hourly UV Index in Siwa

The UV Index tells a compelling story of midday intensity. At 07:00, it starts low at 1, but as the sun rises, so does the UV exposure, reaching 3 by 08:00. The intensity climbs quickly, hitting 5 at 09:00 and soaring to a peak of 12 by noon. 11:00 and 12:00 are the most critical hours, with the UV Index at 11 and 12, urging caution for outdoor activities. After this peak, the index begins its decline, dropping to 10 at 13:00 and then back to 8 at 14:00. By 15:00, it further falls to 5 and continues to decrease, stabilizing at 1 by 17:00 and finally tapering off to 0 by 18:00. This hourly data highlights the importance of sun protection during the midday hours when UV exposure is at its highest.

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	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	12	extreme	10 min
13:00	10	very high	15 min
14:00	8	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 Siwa

The UV Index displays extremely high levels of ultraviolet radiation throughout the year, consistently remaining between 14 and 16 from January to April and September to December. The months of January, February, March, and April experience the highest UV indexes, making them crucial high-risk months for sun exposure, with a burn time as short as 10 minutes in these periods. Visitors and residents should take precautionary measures such as wearing protective clothing, using sunscreen, and seeking shade, especially during peak hours, to reduce their risk of skin damage. As the UV Index begins to dip slightly in June and July, it still remains within the extreme category, warranting continued vigilance. Therefore, it is essential for everyone to stay informed and prioritize sun safety all year round.

Monthly Maximum UV Index for Siwa, Indonesia

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

The table above highlights how UV exposure in Siwa 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.

Siwa'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
Siwa	15	16	16	15	14	12	12	14	15	15	14	14