December 12, 2013; 4:29 AM ET
Sunny conditions will continue through the weekend for San Francisco. more >
Rises at 7:17 AM with 9:35 of sunlight, then sets at 4:52 PM
Rises at 3:16 PM with 14:24 of moolight, then sets at 5:40 AM
Dec 5, 2013; 5:00 AM ET December is a popular month to travel because of the holidays. Some of that travel is not helping the environment. Valerie Smock explains which mode of transportation is best for the Earth.