Barometric Pressure in Pasadena, United States 
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The pressure in Pasadena, California, United States is predicted to rise over the next few hours, with an average pressure of 979.5 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 Pasadena is 4.5 hPa, with a low of 976.9 hPa and a high of 981.4 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Pasadena hour by hour and stay informed about how it will change over the next 6 hours.
Weather patterns in Pasadena cause barometric pressure to rise and fall. When high pressure systems move in, the air presses down, and pressure increases. Low-pressure systems bring rain and decrease pressure.
Pasadena's elevation, 864 feet above sea level, affects atmospheric pressure. The San Gabriel Mountains to the north influence wind patterns and pressure variability. The Arroyo Seco valley also plays a role.
In winter, pressure is usually high, bringing clear skies. Spring and fall see moderate pressure, with gentle weather. Summer low pressure brings hotter temperatures and minimal precipitation.
Pasadena has a Mediterranean climate, characterized by dry summers and mild winters. This climate pattern leads to relatively stable barometric pressure, with moderate fluctuations, making the weather pleasant overall.