Barometric Pressure in San Dimas, United States

• Forecast Chart
• Hourly Trends

The pressure in San Dimas, California, United States is predicted falling over the next 24 hours, with an average pressure of

1012.2

today, which is considered normal.

Weather prediction: Rain at times, very unsettled

The daily total fluctuation in pressure in San Dimas is

2.6

, with a low of

1011

and a high of

1013.6

.

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Forecast

San Dimas has a warm, dry climate. Summers are usually hot, sunny, and very dry. High pressure over the Pacific Ocean often blocks clouds and rain during this season. Some days bring dry Santa Ana winds from the nearby mountains and deserts, which can raise temperatures and increase fire danger.

Winters are mild and wetter. Low pressure systems can move in from the Pacific and bring rain, clouds, and cooler air. Most of the yearly rain falls from November through March. Snow is rare in San Dimas, but the nearby San Gabriel Mountains can receive snow during strong winter storms.

San Dimas sits inland in the San Gabriel Valley, near the foothills. The mountains help block some coastal air, so the city is warmer and less cloudy than places near the ocean. The hills can also affect wind and rainfall. Spring and fall bring changing temperatures, with warm afternoons and cooler nights. Overall, San Dimas has hot, dry summers and mild, partly rainy winters.