Barometric Pressure in Pomona, United States 
1011.9 hPa
29.7 ℃
25%
0.81 m/s
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The average pressure in Pomona, California, United States today is , which is considered normal. Pressure is trending falling.
Weather prediction: Rain at frequent intervals
The daily total fluctuation in pressure in Pomona is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Pomona hour by hour across the next 6 hourly readings.
Weather patterns in Pomona cause barometric pressure to rise and fall. High pressure systems bring clear skies, while low pressure systems bring clouds and storms. Pressure changes quickly when storms move in.
Pomona's elevation of 800 feet above sea level affects atmospheric pressure. The San Gabriel Mountains to the north block some air masses, causing pressure to vary. The valley location also traps air, making pressure changes more dramatic.
In winter, pressure is usually low, bringing rain and cool temperatures. In summer, pressure is high, making it hot and dry. Spring and fall bring gentle pressure changes and mild weather.
Pomona has a Mediterranean climate, characterized by dry summers and wet winters. This climate type means pressure fluctuations are big, making weather changes feel more extreme.