If you planning to travel to Old St. Mary's Cathedral, San Francisco, California, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 1:30 PM. The temperature feels like 61 with a humidity level of 84 so dress accordingly. Cloud coverage is 29 percent with visibility at 8.7 percent. Today’s UV index is 9, don’t forget the sunscreen if you need it! Today’s winds are traveling west-southwest at a speed of 10 MPH. At the end of the day don’t miss the sunset at 2:54 AM.