If you planning to travel to Mt. Gretna Lake & Beach, Lebanon, Pennsylvania, 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 12:01 PM. The temperature feels like 43.150000000000006 with a humidity level of 71 so dress accordingly. Cloud coverage is 26 percent with visibility at 13.1 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 13 MPH. At the end of the day don’t miss the sunset at 9:43 PM.