If you planning to travel to Lewis and Clark State Park, Onawa, Iowa, 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 1:47 PM. The temperature feels like 17.35 with a humidity level of 67 so dress accordingly. Cloud coverage is 32 percent with visibility at 12.9 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling west at a speed of 20 MPH. At the end of the day don’t miss the sunset at 10:55 PM.