Barometric Pressure
Barometric Pressure in Ontario, United States 
0000 hPa
00.0 ℃
00.0%
00.0 m/s
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The pressure in Ontario, California, United States is predicted steady over the next 24 hours, with an average pressure of today, which is lower than normal.
Weather prediction: Unsettled, probably improving
The daily total fluctuation in pressure in Ontario is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Ontario hour by hour and stay informed about how it will change over the next 6 hours.
Upcoming Days
Stay informed about the barometric pressure trends in Ontario for the upcoming days, including daily minimum and maximum readings.
Ontario, California has a Mediterranean climate. This means dry summers and mild, wet winters. The San Bernardino Mountains east of Ontario block wet air from the Pacific Ocean, keeping summers dry. In summer, high air pressure builds, bringing hot, dry air. In winter, low air pressure moves in, bringing rain and cooler temperatures. Overall, Ontario's climate has a big effect on its air pressure, leading to these seasonal weather patterns.