Barometric Pressure in Sunnyvale, United States 
1012.8 hPa
8.7 ℃
69%
1.9 m/s
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The average pressure in Sunnyvale, California, United States today is , which is considered normal. Pressure is trending falling.
Weather prediction: Rain at times, very unsettled
The daily total fluctuation in pressure in Sunnyvale is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Sunnyvale hour by hour across the next 6 hourly readings.
Sunnyvale's coastal location means air from the Pacific Ocean brings moisture, lowering pressure. Changes in this air mass cause pressure to fluctuate. This leads to frequent changes in weather.
Sunnyvale's low elevation near the San Francisco Bay makes it prone to fog and cool air. The surrounding Santa Cruz Mountains block or redirect air flows, affecting pressure.
In winter, low pressure brings rain and windy conditions. Spring and fall see moderate pressure, with clear skies and mild weather. Summer's high pressure brings hot, dry air.
Sunnyvale has a Mediterranean climate, characterized by dry summers and mild winters. This leads to moderate pressure fluctuations, making the weather pleasant but prone to fog and temperature changes.