If you planning to travel to Bourn Cottage, Grass Valley, 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 1:42 PM. The temperature feels like 64.05 with a humidity level of 51 so dress accordingly. Cloud coverage is 2 percent with visibility at 14.9 percent. Today’s UV index is 7, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 4 MPH. At the end of the day don’t miss the sunset at 2:17 AM.