UV Index in Guayanilla, Puerto Rico

Last updated: July 2, 2025

In Guayanilla, Puerto Rico, being aware of the UV Index is crucial for protecting your skin from harmful ultraviolet rays. Especially in this tropical climate, where UV levels can soar as high as 13, understanding these numbers is vital for sunburn prevention and maintaining long-term skin health. With the day's maximum UV exposure typically occurring between 11:00 AM and 1:00 PM, residents and visitors alike should stay informed about daily UV ratings to enjoy the beautiful sunshine safely. Taking the time to check the UV Index can make all the difference in fostering a healthy appreciation for the vibrant outdoor lifestyle that Guayanilla offers.

Hourly UV Index in Guayanilla

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	8	very high	15 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 Guayanilla

The UV Index experiences significant fluctuations throughout the year, peaking during the spring and summer months. From February to October, the index reaches extreme levels, particularly April through October, with a maximum of 14 in April and May, requiring only 10 minutes of exposure for skin damage. January, November, and December are categorized as very high, with longer burn times of 15 minutes. Visitors and residents should exercise caution during the high-risk months of February to October by wearing protective clothing, applying sunscreen, and seeking shade, particularly during midday hours, to minimize the risk of skin damage from harmful UV radiation.

Monthly Maximum UV Index for Guayanilla, Puerto Rico

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

The table above highlights how UV exposure in Guayanilla 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.

Guayanilla'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
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
Guayanilla	9	11	13	14	14	13	13	13	13	12	9	8
Ponce UVI	9	11	13	14	14	13	13	13	14	12	10	9