UV Index in Nairobi, Kenya

Last updated: May 3, 2025

In Nairobi, Kenya, understanding the UV Index is crucial for safeguarding your skin against harmful ultraviolet radiation. The UV Index serves as a vital tool in preventing sunburn, preserving skin health, and lowering the risk of long-term damage. Given Nairobi's unique climate and its elevated UV levels—peaking at a staggering 13 between noon and 1 PM—awareness of the UV Index can help residents and visitors alike plan their outdoor activities more safely. As you explore this vibrant city, remember that even during the cooler hours, the risk doesn’t disappear completely, making it essential to stay informed and protect yourself every day.

Hourly UV Index in Nairobi

As the day unfolds, the UV Index peaks dramatically under the noonday sun. Starting at a gentle 1 at 7:00 AM, it gradually climbs, hitting 5 by 9:00 AM. However, by noon, the UV Index skyrockets to an impressive 13, maintaining its intensity until 1:00 PM. The afternoon sees a gradual decline, with values dropping to 7 at 3:00 PM, and eventually falling back to 1 by 5:00 PM. As evening approaches, the UV Index dips further, signaling the end of the day with a comforting 0 by 7:00 PM. Stay protected during 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	5	moderate	30 min
10:00	8	very high	15 min
11:00	11	extreme	10 min
12:00	13	extreme	10 min
13:00	13	extreme	10 min
14:00	11	extreme	10 min
15:00	7	high	25 min
16:00	4	moderate	30 min
17:00	1	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Nairobi

The UV Index experiences extreme levels throughout the year, with consistently high readings from January to April (ranging from 15 to 16) and only slightly lower values during May to July (11 to 13). The high-risk months extend from January to April, where the UV Index remains at its peak, and even later months like August to October still show considerable risk. Visitors and residents are strongly advised to take precautions during these months by wearing sunscreen, protective clothing, and seeking shade during peak hours. With a uniform burn time of just 10 minutes across all months, it is crucial to remain vigilant to prevent skin damage throughout the year.

Monthly Maximum UV Index for Nairobi, Kenya

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

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

Nairobi's solar exposure compared to other cities in Kenya. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mombasa UVI	14	14	15	14	13	11	11	12	13	13	13	12
Nairobi	15	16	16	16	13	11	11	13	14	14	13	13
Kikuyu UVI	15	16	16	16	13	11	11	13	14	14	13	13
Ruiru UVI	15	16	16	16	13	11	11	13	14	14	13	13
Nakuru UVI	16	17	17	17	14	12	13	14	15	15	14	14