UV Index in Mayagueez, Puerto Rico

Last updated: August 1, 2025

In Mayaguez, Puerto Rico, being aware of the UV Index is crucial for maintaining skin health and preventing sunburn. Understanding daily UV levels helps residents and visitors alike take necessary precautions to protect their skin from the sun's harmful rays. This coastal city, with its tropical climate, experiences heightened UV exposure, especially during midday when the index often reaches extremes. For instance, the UV Index peaks at an intense 13 between 12 PM and 1 PM, highlighting the importance of sun protection measures to keep your skin safe while enjoying the beautiful Puerto Rican sun.

Hourly UV Index in Mayagueez

As the sun rises, the UV Index starts at a gentle 1 by 7:00 AM, perfect for early risers enjoying the fresh morning air. By 9:00 AM, it escalates to a moderate 5, signaling it's time to think about sun protection. The peak arrives at 12:00 PM, when the index hits a scorching 13, marking the sun’s most aggressive rays. For the next hour, it remains at this intense level before gradually declining through the afternoon: 11 at 1:00 PM, 8 at 3:00 PM, and finally down to 4 by 4:00 PM. As the sun sets, the UV Index drops to a safe 1 by 6:00 PM, then to a calming 0 by 7:00 PM, inviting a warm evening to unwind. Enjoy the day, but remember to shield yourself during those 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	2	low	45 min
18:00	1	low	45 min
19:00	0	low	45 min

Monthly UV Index Trends in Mayagueez

Throughout the year, UV Index levels vary significantly, with the highest readings occurring from February to October. During this period, the UV Index remains predominantly in the extreme category, peaking at 14 in May and remaining consistently high at 13 from June to September. The months at highest risk for UV exposure are February to October, where the burn time is reduced to just 10 minutes. January, November, and December see a slight decrease in risk, with UV Index levels categorized as very high and a longer burn time of 15 minutes. Visitors and residents are advised to take extra precautions during these peak months by wearing protective clothing, applying broad-spectrum sunscreen frequently, and seeking shade during peak hours to minimize skin damage.

Monthly Maximum UV Index for Mayagueez, Puerto Rico

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

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

Mayagueez's solar exposure compared to other cities in Puerto Rico. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Mayagueez	9	11	13	13	14	13	13	13	13	12	9	8
Caguas UVI	9	11	13	13	14	13	12	13	13	12	9	8
Carolina UVI	9	11	13	13	14	13	12	13	13	12	9	8
San Juan UVI	9	11	13	13	14	13	12	13	13	12	9	8
Bayamon UVI	9	11	13	13	14	13	13	13	13	12	9	8
Ponce UVI	9	11	13	14	14	13	13	13	14	12	10	9