If you planning to travel to Ontario State Park, Ontario, Oregon, 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 1:53 PM. The temperature feels like 59.8 with a humidity level of 50 so dress accordingly. Cloud coverage is 5 percent with visibility at 14.9 percent. Today’s UV index is 5, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 1 MPH. At the end of the day don’t miss the sunset at 1:17 AM.