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 San Luis Obispo California, United States. San Luis Obispo has a mediterranean climate with dry warm summers and mild winters. The temperature typically varies from 41Â°F to 78Â°F over the course of the year, and is rarely below 33Â°F or above 89Â°F. The warm season lasts for 119 days, from June 21 to October 18, with an average daily high temperature above 75Â°F.