Barometric Pressure in San Juan, United States 
1013 hPa
15.0 ℃
50%
3.0 m/s
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Forecast
Hourly Pressure Trends
Track the barometric pressure in San Juan hour by hour across the next 6 hourly readings.
San Juan, Texas has a semi-arid climate with low air pressure due to its location near the Gulf of Mexico. Ocean winds bring moisture, lowering air pressure.
The Rio Grande Valley's flat landscape allows winds to blow freely, keeping air pressure relatively low. Mountains to the west block cooler air, making San Juan hotter.
During summer, high pressure systems dominate, causing hot and dry weather. In winter, low pressure systems bring cooler and wetter air.
San Juan's climate type is classified as hot semi-arid, characterized by high temperatures and low humidity, resulting in low air pressure year-round.