UV Index in Clanwilliam, South Africa

Last updated: August 1, 2025

Understanding the UV Index in Clanwilliam, South Africa, is crucial for anyone looking to protect their skin from harmful ultraviolet radiation. A high UV Index can lead to sunburn and long-term skin health issues, making it essential to stay informed about daily UV levels. Given Clanwilliam's semi-arid climate, residents and visitors face varying exposure risks, particularly during midday when UV levels peak at 4. By keeping an eye on the UV Index, you can take proactive steps to enjoy the sun safely and maintain healthy skin.

Hourly UV Index in Clanwilliam

The UV Index throughout the day shows a gentle morning rise, starting at 0 at 07:00, then climbing to 1 by 08:00 and staying steady until it reaches 2 at 10:00. Midday brings the peak intensity, with the index soaring to 4 from 12:00 to 14:00, indicating a significant need for sun protection. As the afternoon wears on, the UV levels gradually decline, tapering back down to 1 by 16:00, before dropping to 0 after 18:00. This daily pattern highlights the importance of being mindful of UV exposure, especially between noon and early afternoon when the sun’s rays are at their strongest.

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	0	low	45 min
08:00	1	low	45 min
09:00	2	low	45 min
10:00	3	moderate	30 min
11:00	5	moderate	30 min
12:00	6	high	25 min
13:00	6	high	25 min
14:00	5	moderate	30 min
15:00	4	moderate	30 min
16:00	2	low	45 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Clanwilliam

Throughout the year, UV exposure varies significantly, with January, February, October, November, and December experiencing extreme conditions, characterized by a high UV Index of 15 or 14 and a burn time of just 10 minutes. March follows closely with a UV Index of 12. The high-risk months for UV exposure are thus primarily found in the first quarter of the year and again in late fall. In contrast, April marks a transition to very high exposure (UV Index 9), while May and August shift to a high risk classification. Summer months, particularly June and July, moderate to a 4 on the UV scale, requiring less caution (30 minutes burn time). Visitors and residents should take extra precautions during peak months — especially from January to March and from October to December — by wearing protective clothing, using sunscreen, and limiting sun exposure to avoid harmful effects.

Monthly Maximum UV Index for Clanwilliam, South Africa

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

The table above highlights how UV exposure in Clanwilliam 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.

Clanwilliam'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
Clanwilliam	15	14	12	9	6	4	4	6	9	12	13	15
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
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