UV Index in San Francisco, Colombia

Last updated: June 2, 2025

Understanding the UV Index in San Francisco, Colombia is essential for protecting your skin and maintaining overall health. With the risk of sunburn and long-term skin damage increasing as UV levels rise, being informed can help you make smarter choices about sun exposure. The city's Cfb climate typically brings mild conditions, but the UV Index can reach dangerous levels, peaking at 14 around noon. This highlights the importance of monitoring UV radiation and taking proactive measures to safeguard yourself, ensuring that you enjoy the benefits of the sun while minimizing health risks.

Hourly UV Index in San Francisco

The UV Index throughout the day reveals a dynamic shift in sun intensity. As early as 7:00 AM, it starts at a moderate level of 1, but by 9:00 AM, it climbs to a more potent 7. The peak arrives around 12:00 PM, hitting an intense 14, signaling the need for sun protection. As the afternoon progresses, the index gradually declines, reaching 6 by 3:00 PM, then trailing off to 1 by 5:00 PM and below, settling at 0 by 7:00 PM. This data underscores the importance of being vigilant during midday hours when UV exposure is at its highest. Stay safe and enjoy the sun wisely!

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	4	moderate	30 min
09:00	7	high	25 min
10:00	11	extreme	10 min
11:00	13	extreme	10 min
12:00	14	extreme	10 min
13:00	13	extreme	10 min
14:00	10	very high	15 min
15:00	6	high	25 min
16:00	3	moderate	30 min
17:00	1	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 experiences minimal fluctuation throughout the year, remaining consistently high with an extreme exposure category from January to November, peaking in April at an index of 17. High-risk months for UV exposure are from January to May, with particularly intense exposure in March and April. Notably, despite slight variations in the UV Index, the burn time remains a critical 10 minutes across all months. Therefore, visitors and residents are strongly advised to take precautionary measures year-round, including wearing sunscreen, donning protective clothing, and seeking shade during peak sunlight hours to safeguard against skin damage.

Monthly Maximum UV Index for San Francisco, Colombia

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 Colombia Cities

The table above highlights how UV exposure in San Francisco compares to other major locations across Colombia. 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 Colombia. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Barranquilla UVI	11	12	14	14	13	12	13	13	13	13	11	10
Cartagena UVI	11	11	13	15	13	13	12	13	13	13	11	10
San Francisco	14	15	16	17	15	14	14	15	14	14	13	12
Medellin UVI	14	15	17	16	16	14	14	15	14	14	13	12
Cali UVI	15	16	17	17	15	14	14	14	15	14	13	12
Bogota UVI	15	16	18	18	17	15	15	16	15	15	14	13