Barometric Pressure in Pasadena, United States 
1011.4 hPa
28.7 ℃
37%
0.42 m/s
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The average pressure in Pasadena, California, United States today is , which is considered normal. Pressure is trending falling.
Weather prediction: Rain at frequent intervals
Rapid Pressure Changes
Rapid pressure changes detected in Pasadena, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Rise : ()
The daily total fluctuation in pressure in Pasadena is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Pasadena hour by hour across the next 6 hourly readings.
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.