UV Index in Heilbron, South Africa

Last updated: May 3, 2025

Understanding the UV Index is crucial for the residents of Heilbron, South Africa, where the climate typically falls under the Cwa category, posing unique sun exposure risks. Being aware of UV levels helps prevent sunburn and protects skin health, making daily planning a vital part of outdoor activities. During the peak UV hours, especially around midday, when the index marks a maximum of 7, it’s essential to take precautions. By familiarizing yourself with the UV Index, you can enjoy the sun safely while safeguarding your skin against harmful rays.

Hourly UV Index in Heilbron

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 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