UV Index Today in San Diego, California
Hourly UV Index Chart
Safe Exposure Time
Estimated based on the Fitzpatrick scale for skin color and a UV Index of
*Estimate assumes proper application of broad spectrum sunscreen with reapplication every 2 hours.
Important Safety Information
General Guidelines
These exposure times are estimates based on scientific research and should be used as general guidelines only. Individual responses to UV exposure may vary.
Affecting Factors
UV exposure is affected by: time of day, season, altitude, cloud cover, reflection from surfaces, and individual skin sensitivity.
Protection Tips
For proper sun protection: seek shade during peak UV hours (10 AM - 4 PM), wear protective clothing, use broad-spectrum sunscreen, and monitor the UV index regularly.
Medical Advice
Consult with a healthcare provider for personalized sun protection advice, especially if you have a history of skin conditions or are taking medications that may increase sun sensitivity.
SUNSET & SUNRISE
San Diego's UV Climate
San Diego, located on the Pacific coast of Southern California, experiences a Mediterranean climate with high UV exposure throughout the year. The city's southern location, coastal position, and generally clear skies result in strong UV radiation, particularly during the summer months. The combination of mild year-round weather, outdoor lifestyle, and beach activities makes sun protection essential for residents and visitors, especially during outdoor recreation and coastal activities.
Average Annual UV Index
7.8
Peak UV Season
March - October
Sunny Days per Year
266
Practical Tips for Outdoor Activities
Make the most of outdoor activities while staying safe in San Diego County:
- Check UV index and weather radar before planning outdoor activities
- Schedule outdoor activities during low UV hours
- Use appropriate sun protection based on UV levels
- Stay hydrated during outdoor activities
- Take regular breaks in shaded areas
- Monitor weather conditions for changes
- Be prepared for sudden weather changes
- Know the signs of heat-related illness
- Wear a hat and protective clothing
- Check visibility conditions before outdoor plans
- Stay alert to weather alerts and warnings
UV and Weather in San Diego County
Learn about San Diego County's unique climate patterns, UV radiation levels, and how they affect your daily life. Enter your zip code for location-specific weather radar data and UV forecasts to help you make informed decisions about outdoor activities and sun protection.
Climate and UV Patterns
San Diego's Mediterranean climate creates consistent UV exposure patterns with high to very high UV levels for most of the year. The city receives strong UV radiation due to its southern latitude and coastal location, with UV index values frequently reaching 8-10 during peak hours. Local weather radar shows that while marine layer clouds are common in the morning, they typically burn off by midday, exposing residents to maximum UV radiation. The coastal location also means UV exposure is amplified by reflection from water surfaces.
UV Index and Health Impact
Understanding UV radiation levels is crucial for protecting your health. The UV index in San Diego County varies throughout the year:
- Summer (April-September): High to Very High UV (7-10+)
- Spring/Fall: Moderate to High UV (5-7)
- Winter: Moderate UV (4-6)
- Peak UV hours: 10 AM - 4 PM
- Cloudy conditions: UV reduced by 20-40%
- Clear skies: Maximum UV exposure
- Visibility conditions affect UV intensity
Local Weather Patterns
San Diego's weather patterns significantly influence UV exposure throughout the year. The city experiences a mild Mediterranean climate with distinct wet and dry seasons. The dry season (May to October) features clear skies and maximum UV exposure, while the wet season (November to April) brings occasional rain but still features high UV levels during clear periods. The marine layer creates morning cloud cover that typically dissipates by 10 AM, exposing residents to peak UV hours. The city's coastal location means sea breezes provide cooling but don't reduce UV radiation.