UV Index
UV Index
Today's UV index in San Diego, United States 
will be up to 9.6, indicating a very high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-09
With a UV index of 9.6 in San Diego, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.
San Diego has a UV index that usually ranges from moderate to high, especially during summer months when the sun is strongest. The UV levels are lower in winter but still present throughout the year.
San Diego experiences mild, wet winters and warm, dry summers. Most rain falls between November and March. The city rarely has extreme temperatures, with summer highs often around the low 70s to mid-80s Fahrenheit and winter lows rarely dropping below 50°F.
Compared to other parts of Southern California and neighboring states, San Diego's weather is milder and less extreme. It is cooler and less rainy than inland areas and warmer and sunnier than many northern U.S. cities. Neighboring Mexico's coastal regions have similar weather patterns.
See the UV index hour by hour for San Diego, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.