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.
Weather in San Diego in March 2018. Expect 19Â°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in San Diego in March. Check more long-term weather averages for San Diego in March before you book your next holiday to California in 2018.