UV Index in Flagstaff, South Africa

Last updated: July 2, 2025

In Flagstaff, South Africa, awareness of the UV Index is crucial for safeguarding your skin against the harmful effects of sun exposure. Understanding UV levels empowers residents and visitors to take proactive measures in preventing sunburn and promoting long-term skin health. With its Cfb climate, Flagstaff experiences varying UV exposure, peaking at a level of 5 around noon. As you enjoy the sunny days, staying informed about UV risks is vital for maintaining your well-being while embracing the outdoors.

Hourly UV Index in Flagstaff

The UV Index throughout the day follows a distinct pattern, with the intensity peaking at 12:00 PM when it reaches a noteworthy level of 5. Morning hours start off mild, with values of 1 at 07:00 and 08:00, gradually escalating to 2 by 09:00, then climbing to 4 at 11:00. Post-noon, the index slightly decreases, falling to 4 again at 13:00, before tapering off to 2 by 15:00. As the day winds down, the levels drop significantly, plunging to 0 by 19:00. This highlights the importance of sun protection during the midday hours when UV radiation is at its 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	1	low	45 min
08:00	1	low	45 min
09:00	2	low	45 min
10:00	3	moderate	30 min
11:00	4	moderate	30 min
12:00	5	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 Flagstaff

The UV Index experiences significant fluctuations throughout the year, with the highest levels recorded from January to March and again in November and December, all categorized as extreme with burn times ranging from 10 minutes. April sees a decline to a very high category (burn time 15 minutes), while May and August are classified as high, allowing for longer exposure of 25 minutes. From June to July, the UV Index falls to a moderate level (burn time 30 minutes) before increasing again in September to very high. As such, January, February, March, October, November, and December are particularly high-risk months for UV exposure. Visitors and residents are strongly advised to take precautions during these periods, utilizing sunscreen, wearing protective clothing, and limiting sun exposure, especially during peak hours to reduce the risk of skin damage.

Monthly Maximum UV Index for Flagstaff, South Africa

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

The table above highlights how UV exposure in Flagstaff 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.

Flagstaff'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
Flagstaff	15	14	12	9	6	4	5	7	10	12	13	16
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