Atenolol and chlorthalidone combination is used to treat high blood pressure (hypertension). High blood pressure adds to the workload of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly.
San Marcos Average Weather. 1  The highest monthly average temperature in San Marcos for August is 70 degrees. 2  The lowest monthly average temperature in San Marcos for January is 55 degrees. 3  The most monthly precipitation in San Marcos occurs in January with 2.3 inches.  The air quality index in San Marcos is 22% worse than the national average.
Selected San Marcos hotels. 1  Comfort Suites San Marcos (at 104 Highway 35 North in San Marcos) 2  Executive Inn and Suites (at 930 Highway 35 North in San Marcos) 3  Motel 6 San Marcos (at 1321 North I-35 in San Marcos) 4  Hampton Inn & Suites San Marcos (at 106 I H 35 in San Marcos) 5  Howard Johnson San Marcos (at 1601 I-H 35 North in San Marcos)