If you planning to travel to Holter Lake, Helena, 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 2:41 PM. The temperature feels like 28.950000000000003 with a humidity level of 80 so dress accordingly. Cloud coverage is 67 percent with visibility at 8 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling west-southwest at a speed of 6 MPH. At the end of the day don’t miss the sunset at 11:46 PM.