UV Index in Tonj, South Sudan

Last updated: July 2, 2025

Understanding the UV Index in Tonj, South Sudan is crucial for protecting your skin and overall health. As the midday sun reaches astounding UV levels, peaking at 13 around noon, awareness helps you take proactive measures against sunburn and long-term skin damage. With Tonj’s Aw climate, characterized by hot and dry conditions, residents and visitors alike must be mindful of the heightened UV exposure risks throughout the day. Stay informed, plan your outdoor activities wisely, and enjoy the sun safely!

Hourly UV Index in Tonj

The UV Index presents a dynamic story throughout the day, beginning with a gentle 1 at 7:00 AM, ideal for a morning stroll. As the sun rises, the intensity increases, hitting 3 by 8:00 AM and reaching 5 at 9:00 AM—a sign that sunscreen should start making an appearance. The peak comes between 11:00 AM and 12:00 PM, soaring to a striking 11 and then a maximum of 13 at noon, signaling a time when direct sun exposure can be particularly harmful. A gradual decline follows, with the index dropping to 9 by 2:00 PM, and easing back to 1 as evening approaches, reminding us to seek shade during the hottest hours. As the day winds down, the index concludes at 0 by 7:00 PM, inviting a leisurely night's rest.

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	9	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	12	extreme	10 min
14:00	9	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Tonj

The UV Index exhibits significant seasonal variation, reaching its peak during late spring and summer months, particularly in April, May, and August, with an extreme level of 14. Visitors and residents should be especially cautious between February and August when the UV levels remain dangerously high, with a consistent index of 13 or 14, leading to a burn time of just 10 minutes. Conversely, the risk decreases slightly in late autumn and winter, with November and December still categorized as very high but with a slightly longer burn time of 15 minutes. It is crucial for everyone to take proactive measures such as wearing sunscreen, protective clothing, and sunglasses, particularly during these high-risk months to mitigate the harmful effects of UV radiation.

Monthly Maximum UV Index for Tonj, South Sudan

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

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

Tonj's solar exposure compared to other cities in South Sudan. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Malakal UVI	11	12	13	14	13	12	13	14	13	12	10	10
Winejok UVI	11	12	13	14	13	12	13	14	13	12	10	10
Tonj	11	13	13	14	14	12	13	14	13	12	10	10
Wau UVI	11	13	13	14	14	12	13	14	14	12	10	10
Juba UVI	12	14	15	15	14	12	11	13	13	12	11	10
Yei UVI	13	14	15	15	14	13	12	13	13	12	12	11