UV Index in Arusha, Tanzania

Last updated: July 2, 2025

Understanding the UV Index in Arusha, Tanzania, is crucial for maintaining skin health and preventing sunburn, particularly given the region's elevated UV levels. With a climate classified as Cwb, Arusha experiences intense midday sunlight, where UV readings can peak at a striking 12 between noon and 1 PM. Awareness of these fluctuations not only helps residents and visitors protect themselves during outdoor activities but also fosters a broader understanding of the risks associated with prolonged sun exposure. By staying informed about the UV Index, you can enjoy the beauty of Arusha while safeguarding your skin against harmful effects.

Hourly UV Index in Arusha

The UV Index today showcases a dynamic rise and fall throughout the hours. Starting the morning at a modest 1 at both 07:00 and 08:00, it gradually intensifies, peaking at a striking 12 between 12:00 and 13:00—a clear signal for sun protection. Early afternoon brings a slight decline to 10 at 14:00, followed by a gentle drop to 7 by 15:00. As the day winds down, the index dips swiftly to 4 at 16:00, before settling back to 1 by 18:00 and finally reaching a 0 at 19:00. As the sun makes its ascent and descent, it's crucial to stay aware of these UV fluctuations to protect your skin!

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	3	moderate	30 min
10:00	6	high	25 min
11:00	10	very high	15 min
12:00	12	extreme	10 min
13:00	12	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	4	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 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