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 1:44 PM. The temperature feels like -4.8 with a humidity level of 70 so dress accordingly. Cloud coverage is 9 percent with visibility at 14 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southwest at a speed of 9 MPH. At the end of the day don’t miss the sunset at 10:53 PM.