UV Index in Randburg, South Africa

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents of Randburg, South Africa, where sun exposure can significantly impact skin health and overall well-being. South Africa's sunny climate, especially in the Cwb climate zone, brings with it varying levels of UV radiation throughout the day. Specifically, during peak sunlight hours, the UV Index can reach levels as high as 7, indicating a heightened risk of sunburn and skin damage. By staying informed about daily UV levels, you can take proactive measures to protect your skin, ensuring a healthier and more enjoyable outdoor experience all year round.

Hourly UV Index in Randburg

The UV Index for the day provides a clear picture of sun exposure. Starting off gently at 1 in the early hours, the intensity gradually builds, reaching a peak of 7 between 11:00 and 12:00. This is the ideal time for sun protection, as skin can burn quickly. As the afternoon progresses, the index declines, dropping to 3 by 15:00 and further down to 1 by late afternoon. After sunset, the UV Index falls to 0, indicating safe conditions. Stay sun smart, especially during the peak hours for maximum protection!

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	1	low	45 min
09:00	3	moderate	30 min
10:00	5	moderate	30 min
11:00	7	high	25 min
12:00	7	high	25 min
13:00	6	high	25 min
14:00	5	moderate	30 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 Randburg

The UV Index experiences significant fluctuations throughout the year, with the highest levels occurring in the winter months. From January to March, the index remains extremely high, peaking at 16 in December and consistently staying around 15 to 14 until late November. During these months, burn times are critically short, averaging just 10 minutes. As spring approaches, a slight decrease occurs in April to a very high level of 10, followed by lower high levels of 7 to 6 from May through July, which afford burn times of about 25 minutes. August sees a rise back to 9 before the UV Index sharply increases again to 11 in September and peaks once more in October with 13. Visitors and residents should be especially cautious between January and March, as well as September through November, when exposure is categorized as extreme. It is advisable to take protective measures such as wearing sunscreen, protective clothing, and seeking shade during peak sun hours.

Monthly Maximum UV Index for Randburg, South Africa

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

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

Randburg's solar exposure compared to other cities in South Africa. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cape Town UVI	14	13	11	8	5	3	4	6	9	11	12	14
Durban UVI	14	13	12	9	6	4	5	7	9	11	13	15
Johannesburg UVI	15	15	13	10	7	6	6	8	11	12	14	16
Randburg	15	15	13	10	7	6	6	9	11	13	14	16
Pretoria UVI	16	15	13	10	7	6	6	9	11	13	14	16
Soweto UVI	16	15	13	11	7	6	6	8	11	13	15	16