Barometric Pressure in Livermore-Pleasanton, United States 
1000.8 hPa
10.8 ℃
60%
2.94 m/s
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The average pressure in Livermore-Pleasanton, California, United States today is , which is lower than normal. Pressure is trending rising.
Weather prediction: Fine, possible showers
The daily total fluctuation in pressure in Livermore-Pleasanton is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Livermore-Pleasanton hour by hour across the next 6 hourly readings.
Livermore and Pleasanton have a Mediterranean climate. Summers are hot, sunny, and very dry. Winters are mild, with most of the yearly rain falling from November through March. Snow is very rare in the valley.
High pressure often sits over the Pacific Ocean in summer. It blocks storms and keeps the sky clear. In winter, low pressure systems can move in from the Pacific. These storms bring clouds, wind, and rain. Air pressure can also change quickly when a storm arrives or leaves.
The area lies in inland valleys between the Diablo Range and other coastal hills. These hills block much of the cool, damp air from the San Francisco Bay. As a result, Livermore and Pleasanton are usually warmer and drier than areas closer to the coast. The hills can also trap cool air at night, causing chilly mornings and occasional fog.
Temperatures often change a lot between day and night. Summer days may be very hot, but evenings can cool quickly. Spring and fall have comfortable days with changing temperatures. Winter days are cool to mild, while nights can be cold, especially in Livermore Valley.