UV Index in Santo Antonio, Sao Tome and Principe

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Santo Antonio, São Tomé and Príncipe, where the sun shines brightly in its tropical climate. With UV levels peaking around noon, reaching as high as 13, being aware of these fluctuations is essential for sunburn prevention and overall skin health. High UV exposure can lead to serious skin damage, making it vital to adapt your outdoor activities and protective measures accordingly. Whether you're soaking in the sun or exploring the island's natural beauty, knowing the UV Index will help you enjoy your time safely while minimizing risks.

Hourly UV Index in Santo Antonio

The UV Index for the day showcases a dynamic sunlit journey. Starting at 07:00 with a mild UV Index of 2, the intensity rises steadily, reaching a peak of 13 at 11:00—a prime time for sun exposure. The index then slightly dips to 10 at 13:00, before gradually declining to a gentle 3 by 15:00. As evening approaches, anticipation fades as the UV levels drop, culminating in a calm 0 by 19:00. For sun-seekers and outdoor enthusiasts, midday demands caution and protection, while the late afternoon offers a safer window for activity under the fading 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	2	low	45 min
08:00	4	moderate	30 min
09:00	8	very high	15 min
10:00	11	extreme	10 min
11:00	13	extreme	10 min
12:00	12	extreme	10 min
13:00	10	very high	15 min
14:00	7	high	25 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 Santo Antonio

The UV Index experiences notable fluctuations throughout the year, with extreme levels persisting from January to June and again in August to November, indicating a high risk of harm from unprotected sun exposure. The highest readings occur in March and April, reaching a peak of 14, while July marks a slight decline to 10, categorized as very high. For visitors and residents, the months of January through June and August through November represent high-risk months for sunburn, with a critical burn time of just 10 minutes for most of the year, except in July, when it is slightly extended to 15 minutes. It is essential for individuals to take precautions, such as wearing sunscreen, protective clothing, and seeking shade, during these months to protect against harmful UV radiation.

Monthly Maximum UV Index for Santo Antonio, Sao Tome and Principe

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Santo Antonio. 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 Santo Antonio, 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 Santo Antonio UV Index with Other Sao Tome and Principe Cities

The table above highlights how UV exposure in Santo Antonio compares to other major locations across Sao Tome and Principe. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Santo Antonio's solar exposure compared to other cities in Sao Tome and Principe. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Santo Antonio	12	12	14	14	13	11	10	11	13	13	12	11
Sao Joao dos Angolares UVI	12	13	13	14	13	10	10	11	13	13	13	12
Trindade UVI	12	13	13	14	13	10	10	11	13	13	13	12
Guadalupe UVI	12	13	13	14	13	10	10	11	13	13	13	12
Sao Tome UVI	12	13	13	14	13	10	10	11	13	13	13	12