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.
Average Weather in February in San Diego California, United States. In San Diego, the month of February is characterized by essentially constant daily high temperatures, with daily highs around 66Â°F throughout the month, rarely exceeding 75Â°F or dropping below 59Â°F.