UV Index in Clanwilliam, South Africa

Last updated: June 2, 2025

Understanding the UV Index in Clanwilliam, South Africa, is crucial for protecting your skin and overall health. With its BSh climate, Clanwilliam experiences significant UV exposure, particularly during midday hours, when levels can peak at a moderate 4. This underscores the importance of being aware of UV levels—keeping you and your loved ones safe from sunburn and long-term skin damage. By monitoring the UV Index, you can better plan your outdoor activities, ensuring you enjoy the sunny South African landscape while minimizing the risks associated with sun exposure.

Hourly UV Index in Clanwilliam

The UV Index throughout the day reveals a dynamic pattern of sun intensity. In the morning, it starts off low, peaking at 1 by 09:00. As the sun climbs higher, we see a steady increase with the index reaching 3 by 11:00. The highest point occurs from 12:00 to 13:00, where the UV Index hits a robust 4, indicating a need for sun protection during those hours. Following this peak, the index gradually declines, returning to 2 at 15:00, and then dropping back down to 0 by 18:00, marking the end of significant UV exposure for the day. Plan your outdoor activities accordingly to stay safe under the sun!

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	1	low	45 min
10:00	2	low	45 min
11:00	3	moderate	30 min
12:00	4	moderate	30 min
13:00	4	moderate	30 min
14:00	3	moderate	30 min
15:00	2	low	45 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 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