Barometric Pressure in San Marcos, United States 
0000 hPa
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The pressure in San Marcos, Texas, United States is predicted to rise over the next few hours, with an average pressure of 993.3 hPa today, which is lower than normal.
Weather prediction: Expect fair, dry, cool weather and a strong breeze
The daily total fluctuation in pressure in San Marcos is 4.4 hPa, with a low of 991 hPa and a high of 995.4 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in San Marcos hour by hour and stay informed about how it will change over the next 6 hours.
Weather patterns in San Marcos cause barometric pressure to rise and fall. Changes in pressure bring different types of weather. High pressure means fair weather, while low pressure means stormy weather.
San Marcos's elevation is about 200 meters above sea level. The surrounding hills and valleys affect atmospheric pressure. The landscape makes pressure change quickly.
In winter, pressure is usually high, and skies are clear. In spring and fall, pressure is lower, and storms are more likely. In summer, pressure is high, and days are hot.
San Marcos has a humid subtropical climate. Barometric pressure fluctuations are small, making the weather feel comfortable most of the time.