UV Index in Siuna, Nicaragua

Last updated: July 2, 2025

Understanding the UV Index is crucial for residents and visitors in Siuna, Nicaragua, where the tropical climate intensifies exposure to harmful ultraviolet rays. With peaks reaching as high as 13 during midday, awareness of UV levels can be vital for preventing sunburn and protecting your skin health. As you navigate Siuna's sunny days, being informed about these risks allows you to enjoy the beautiful outdoors while safeguarding your well-being. Whether you're basking in the sun or exploring the lush landscapes, knowing the UV Index empowers you to take the necessary precautions for a safe and enjoyable experience.

Hourly UV Index in Siuna

The UV index throughout the day presents an intriguing journey of exposure, peaking at 13 from 11:00 AM to 12:00 PM—the sun's most intense moment. Starting from a modest 2 at 7:00 AM, the index swiftly escalates, hitting 4 by 8:00 AM and soaring to a substantial 11 at 10:00 AM. Just one hour later, it reaches its zenith, radiating at 13, before gradually descending as the afternoon wanes. By 3:00 PM, it's a more manageable 5, eventually dwindling down to 0 by 7:00 PM, signaling a safe retreat from the sun's rays. This dynamic UV pattern serves as a reminder to stay vigilant under the sun, especially during its peak hours when protective measures are essential.

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	13	extreme	10 min
13:00	11	extreme	10 min
14:00	8	very high	15 min
15:00	5	moderate	30 min
16:00	2	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 Siuna

Throughout the year, UV exposure levels show significant seasonal variation, with high-risk months primarily occurring from February to October, where the UV Index frequently reaches extreme levels. Notably, March, April, and May represent the peak months with a UV Index of 14, demanding swift action to protect skin from harmful exposure, with a burn time as brief as 10 minutes. Residents and visitors are advised to take necessary precautions during these months, such as wearing protective clothing, applying broad-spectrum sunscreen, and seeking shade during peak sun hours. As a slight reprieve, UV levels decrease in November and December, but even then, individuals should remain vigilant as the UV Index can still reach 9-10, designating these months as still requiring careful management of sun exposure.

Monthly Maximum UV Index for Siuna, Nicaragua

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

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

Siuna's solar exposure compared to other cities in Nicaragua. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Chinandega UVI	11	12	14	14	14	14	13	13	13	13	10	9
Siuna	10	12	14	14	14	13	13	13	13	13	10	9
Leon UVI	11	12	14	14	14	14	13	13	13	13	10	10
Managua UVI	11	13	14	14	14	13	13	13	13	13	10	10
Masaya UVI	11	13	14	14	14	14	14	13	13	13	10	10
Matagalpa UVI	11	13	15	15	14	14	14	14	14	14	11	10