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 11:39 AM. The temperature feels like 52 with a humidity level of 88 so dress accordingly. Cloud coverage is 84 percent with visibility at 8 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southwest at a speed of 12 MPH. At the end of the day don’t miss the sunset at 12:18 AM.