UV Index in San Francisco, Panama

Last updated: June 2, 2025

Understanding the UV Index in San Francisco, Panama is crucial for protecting your skin and maintaining overall health. The UV Index measures the sun's ultraviolet (UV) radiation levels, helping you gauge the risk of sunburn and long-term skin damage. With San Francisco's tropical climate, UV levels can soar, particularly around midday when the index reaches its peak of 13. Being aware of these levels is vital for enjoying the outdoors safely while avoiding harmful effects. Whether you're soaking up the sun at the beach or exploring the city, knowing when to seek shade or apply sunscreen can keep your skin safe and healthy.

Hourly UV Index in San Francisco

The UV Index peaks dramatically throughout the day, starting from a mild 1 at 07:00 and rapidly escalating to a max of 13 between 12:00 and 13:00. As the sun climbs higher, the intensity of UV radiation intensifies, reaching a pivotal 12 at 11:00—a clear signal to seek shade if you're outdoors! The afternoon sees a gradual decline, slipping back to 7 by 15:00 and tapering down to a gentle 1 by 18:00. As the day winds down, the UV threat diminishes, hitting a low of 0 by 19:00. Be sure to protect your skin during the peak hours, especially between 10:00 and 14:00!

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	9	very high	15 min
11:00	12	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 San Francisco

The UV Index showcases a strikingly consistent pattern of extreme exposure throughout the year, with values peaking at 15 in both April and May. Notably, the high-risk months span from January to October, where the UV Index remains above 12, indicating a persistent threat of skin damage with a burn time as short as 10 minutes. As such, it is crucial for visitors and residents to take precautionary measures year-round, including wearing protective clothing, using high-SPF sunscreen, and seeking shade during peak hours. Awareness and proactive steps are essential to safeguard against the dangers posed by intense UV exposure.

Monthly Maximum UV Index for San Francisco, Panama

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

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

San Francisco's solar exposure compared to other cities in Panama. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Arraijan UVI	12	13	14	15	14	13	14	13	13	13	11	10
Juan Diaz UVI	12	13	14	15	14	13	14	13	13	13	11	10
San Miguelito UVI	12	13	14	15	14	13	14	13	13	13	11	10
Panama UVI	12	13	14	15	14	13	14	13	13	13	11	10
David UVI	12	13	14	15	14	13	14	13	14	14	12	11
San Francisco	12	13	14	15	15	13	14	13	14	14	12	11