March 30, 2021 1:52 pm UV Index: Why Does It Change Throughout the Year? How do UV rays change throughout the year and why is it possible to get a sunburn even when it’s cloudy? NBC 7 Meteorologist Sheena Parveen has everything you need to know about the UV index. US & World Videos 1:34 San Diego Padres team up to give away Thanksgiving meals 3:16 Holiday market and tree lighting kick off holidays in Chula Vista 2:35 East Village affordable-housing complex marks milestone 22:56 Politically Speaking: Mike Levin's plans for his fourth House term 2:37 San Diego Housing Commission deciding what to do about shelter beds