UV Index
UV Index
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Today's UV index in Chula Vista, United States 
will be up to 3.1, indicating a moderate level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
With a UV index reaching up to 3.1 in Chula Vista, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
The UV index in Chula Vista, United States, can reach a high of 11 during summer months.
Chula Vista has a semi-arid climate, meaning it has two main seasons: a dry season from May to October and a wet season from November to April. The city experiences warm temperatures year-round, with average highs ranging from 66°F (19°C) in winter to 78°F (26°C) in summer.
Compared to its region and neighboring countries, Chula Vista is relatively temperate. While much of Mexico and the Southwestern United States experience extremely hot summers and cold winters, Chula Vista's coastal location provides a more moderate climate. However, it still experiences less rainfall than nearby cities to the north, such as San Francisco.
The chart below displays the average Shortwave Radiation Sum (MJ/m²) for each month of the last year in Chula Vista. It's designed to provide you with a better understanding of the yearly weather and sun exposure.