UV Index in Arusha, Tanzania

Last updated: May 3, 2025

Understanding the UV Index in Arusha, Tanzania, is crucial for safeguarding your skin and overall health under the vibrant sun. With UV levels peaking at an intense 14 between noon and 1 PM, awareness of these fluctuations can help you prevent sunburn and reduce the risk of long-term skin damage. Arusha’s Cwb climate means that while temperatures are mild, the sun's rays can still deliver significant exposure risks, especially during the midday hours. By staying informed about the UV Index, you can enjoy the beautiful landscapes of Arusha while protecting your skin from harmful effects.

Hourly UV Index in Arusha

The UV Index today showcases a dynamic range of exposure throughout the day. Starting off modestly at 1 at 07:00, the intensity rapidly escalates, hitting 2 by 08:00. The sun’s power shows no signs of restraint as it peaks at an impressive 14 around 12:00. From this zenith, the UV levels begin to taper off, settling at 11 by 14:00, and then drifting downwards to 4 by 16:00. As evening approaches, the index drops significantly, falling back to 1 by 17:00 and eventually to 0 at 19:00. For those venturing outdoors, it’s crucial to protect your skin during the midday hours when the UV index 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	2	low	45 min
09:00	5	moderate	30 min
10:00	8	very high	15 min
11:00	12	extreme	10 min
12:00	14	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 Arusha

Throughout the year, the UV Index consistently remains at extreme levels, highlighting a significant risk for sunburn. January to April sees the highest UV Index readings, ranging from 15 to 16, indicating that residents and visitors should take extra precautions when exposed to sunlight, as burn time is as little as 10 minutes. The risk remains high in May and June with values of 14 and 12, respectively, before slightly decreasing through the summer months of July and August. September to November returns to UV Index levels around 13 to 14, and finally, December sees a slight drop to 14, yet maintains the extreme exposure category. It is crucial for everyone to apply sunscreen, wear protective clothing, and limit sun exposure during all months, especially from January through April when the risk is paramount.

Monthly Maximum UV Index for Arusha, Tanzania

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

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

Arusha's solar exposure compared to other cities in Tanzania. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Zanzibar UVI	14	14	14	14	12	10	10	12	13	13	13	13
Dar es Salaam UVI	14	14	15	14	12	10	10	12	13	13	13	13
Mwanza UVI	14	15	16	15	13	11	11	13	14	13	13	13
Arusha	15	16	16	16	14	12	12	13	14	14	13	14
Mbeya UVI	16	16	16	16	13	11	11	13	14	14	14	15