Barometric Pressure in San Mateo, United States 
1010.9 hPa
25.1 ℃
26%
2.42 m/s
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The average pressure in San Mateo, California, United States today is , which is considered normal. Pressure is trending rising.
Weather prediction: Fine, possible showers
The daily total fluctuation in pressure in San Mateo is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in San Mateo hour by hour across the next 6 hourly readings.
The barometric pressure in San Mateo, California is typically mild. It ranges from 30.04 to 30.25 inches. This is slightly above the national average.
San Mateo is situated near the San Francisco Bay. The bay's waters have a moderating effect on the city's climate. The surrounding hills also play a role.
The hills to the west of San Mateo block cold air from the Pacific Ocean. This prevents the city from getting too cold. The hills also block warm air from the inland valleys.
As a result, San Mateo's climate is mild and stable. This stability is reflected in the barometric pressure. It rarely fluctuates greatly.