If you planning to travel to Old Idaho Penitentiary, Boise, Idaho, 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 2:49 PM. The temperature feels like 38.5 with a humidity level of 69 so dress accordingly. Cloud coverage is 5 percent with visibility at 14.8 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling east-southeast at a speed of 5 MPH. At the end of the day don’t miss the sunset at 12:12 AM.