If you planning to travel to Patapsco Valley State Park, Baltimore, Maryland, 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 9:42 AM. The temperature feels like 79.1 with a humidity level of 66 so dress accordingly. Cloud coverage is 66 percent with visibility at 17.1 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 9 MPH. At the end of the day don’t miss the sunset at 12:39 AM.