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 12:24 PM. The temperature feels like 12.850000000000001 with a humidity level of 51 so dress accordingly. Cloud coverage is 34 percent with visibility at 14.9 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling northwest at a speed of 15 MPH. At the end of the day don’t miss the sunset at 9:45 PM.