UV Index
UV Index
Today's UV index in Chula Vista, United States 
will be up to 9.7, 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: 2025-05-10
With a UV index of 9.7 in Chula Vista, 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.
Chula Vista's UV index varies seasonally, typically ranging from moderate levels in winter to high levels in summer, peaking around 8 to 10 during late spring and early summer months. This means the sun's rays are stronger in those times of the year.
The weather in Chula Vista shows warm, dry summers and mild, wetter winters. Temperatures are generally comfortable year-round, with summer highs in the mid-70s to mid-80s Fahrenheit and winter lows rarely dropping below the 40s or 50s.
Compared to the wider Southern California region, Chula Vista has a similar Mediterranean climate but is slightly cooler due to its coastal location. It's milder and less rainy than inland areas and typically warmer and drier than northern California cities.
See the UV index hour by hour for Chula Vista, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.