Barometric Pressure in San Juan, United States 
1025.8 hPa
21.9 ℃
34%
3.26 m/s
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The average pressure in San Juan, Texas, United States today is , which is higher than normal. Pressure is trending falling.
Weather prediction: Rain at times, worse later
The daily total fluctuation in pressure in San Juan is , with a low of and a high of .
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.