UV Index in Heilbron, South Africa

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Heilbron, South Africa, where the climate often leads to higher levels of ultraviolet radiation. As sunburn can occur quickly, being aware of UV levels helps protect your skin health and prevents long-term damage. In this region, typical UV exposure risks peak between 11:00 AM and 1:00 PM, with an index reaching as high as 6, indicating a need for effective sun protection during those hours. By staying informed about the UV Index, you can enjoy Heilbron’s beautiful sunny days safely and responsibly.

Hourly UV Index in Heilbron

As the sun rises, the UV Index remains low, peaking only at 1 until 9:00 AM. A gradual increase sees it reach 6 by noon, indicating peak sun intensity. The high point of 6 persists until 1:00 PM, making this the ideal time to take precautions if you're outdoors. After this, the index begins to decline, dropping to 4 by 2:00 PM and falling further to 1 by 4:00 PM. By the evening, the UV levels settle at 0, ensuring a safe outdoor experience. Remember, during the midday hours, it’s crucial to stay protected 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	1	low	45 min
08:00	1	low	45 min
09:00	2	low	45 min
10:00	4	moderate	30 min
11:00	5	moderate	30 min
12:00	6	high	25 min
13:00	6	high	25 min
14:00	4	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 Heilbron

Throughout the year, UV exposure in this region experiences significant fluctuations, with January, February, March, April, September, October, November, and December categorized as high-risk months, exhibiting extreme UV Index levels ranging from 11 to 16 and resulting in a rapid burn time of just 10 minutes. May and July have a moderate UV Index, shifting to a high risk level, while June sees a decrease to a moderate exposure category, allowing for a longer burn time of 30 minutes. The peak of UV intensity occurs in the winter months, making it especially crucial for both visitors and residents to protect themselves. It is advised to minimize sun exposure during these high-risk months by wearing protective clothing, applying sunscreen, and seeking shade whenever possible, even on overcast days.

Monthly Maximum UV Index for Heilbron, South Africa

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

The table above highlights how UV exposure in Heilbron 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.

Heilbron'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
Heilbron	15	15	13	11	7	5	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