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 1:17 PM. The temperature feels like 44.25 with a humidity level of 99 so dress accordingly. Cloud coverage is 83 percent with visibility at 5.4 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling east at a speed of 11 MPH. At the end of the day don’t miss the sunset at 10:59 PM.