If you planning to travel to San Antonio Missions National Park, San Antonio, Texas, 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 1:12 PM. The temperature feels like 58.8 with a humidity level of 49 so dress accordingly. Cloud coverage is 91 percent with visibility at 14.4 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling east-northeast at a speed of 9 MPH. At the end of the day don’t miss the sunset at 11:35 PM.