If you planning to travel to Crystal Lake Park, Crystal Lake, Illinois, 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 1:11 PM. The temperature feels like 9.6 with a humidity level of 67 so dress accordingly. Cloud coverage is 73 percent with visibility at 15.8 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southwest at a speed of 11 MPH. At the end of the day don’t miss the sunset at 11:04 PM.