UV Index in Waterloo, Sierra Leone

Last updated: May 3, 2025

Understanding the UV Index is crucial for residents and visitors in Waterloo, Sierra Leone, where the tropical climate can lead to significant sun exposure throughout the year. Monitoring UV levels is essential not only for preventing painful sunburns but also for maintaining long-term skin health. With peak UV Index values reaching a potentially harmful 12 at noon, it's imperative to be aware of the risks, especially when the sun is at its strongest between late morning and early afternoon. By staying informed about UV conditions, you can enjoy the bright, sunny days of Waterloo while protecting yourself from the harmful effects of UV radiation.

Hourly UV Index in Waterloo

Experience a dynamic increase in UV Index throughout the day, peaking at an impressive 13 around 1:00 PM. The sun reaches its zenith with an intense UV Index of 12 at noon, reminding us to stay protected. From the early morning, we see a gentle rise, starting at 1 at 7:00 AM, and by 10:00 AM, it jumps to a moderate 7. As the hours progress, the index escalates, hitting a high of 10 at 11:00 AM before reaching its summit. In the afternoon, the UV Index gradually declines, falling to 5 by 4:00 PM, and tapering off to a 0 by 7:00 PM. Remember to strike a balance between enjoying the sun and protecting your skin during these peak hours!

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	2	low	45 min
09:00	4	moderate	30 min
10:00	7	high	25 min
11:00	10	very high	15 min
12:00	12	extreme	10 min
13:00	13	extreme	10 min
14:00	11	extreme	10 min
15:00	8	very high	15 min
16:00	5	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Waterloo

The UV Index fluctuates significantly throughout the year, with high-risk months typically spanning from February to October, when levels reach an extreme category (11–13). During these months, the recommended burn time drops to just 10 minutes, underscoring the necessity for sun protection. January and November reflect very high exposure levels (UV Index 10), allowing a slightly longer burn time of 15 minutes. Visitors and residents are advised to take precautions, such as wearing sunscreen, protective clothing, and sunglasses, especially between February and October, to minimize the risk of skin damage and ensure a safe outdoor experience.

Monthly Maximum UV Index for Waterloo, Sierra Leone

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Waterloo. 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 Waterloo, 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 Waterloo UV Index with Other Sierra Leone Cities

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

Waterloo's solar exposure compared to other cities in Sierra Leone. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Waterloo	10	11	11	12	13	12	13	13	13	12	10	9
Freetown UVI	10	11	11	12	13	12	13	13	13	12	10	9
Bo UVI	10	11	11	13	13	12	12	13	13	12	10	10
Makeni UVI	10	11	11	12	13	13	13	13	14	12	10	9
Kenema UVI	11	11	11	13	13	12	13	13	13	12	10	10
Koidu UVI	11	11	12	13	13	13	13	13	14	12	10	10