Barometric Pressure in Dillon, United States 
1013 hPa
15.0 ℃
50%
3.0 m/s
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Forecast
Hourly Pressure Trends
Track the barometric pressure in Dillon hour by hour across the next 6 hourly readings.
Dillon, Montana is in a valley, which makes the air pressure change more slowly than in nearby mountains. This means the air is often calm and stable.
The valley's shape and surrounding mountains block winds from the west, making the air pressure rise and fall more gently. This leads to fewer strong storms and more calm days.
In winter, cold air from the north presses down on Dillon, making the air pressure rise and leading to clear, cold days. In summer, warm air from the south rises, making the air pressure fall and bringing thunderstorms.
Dillon has a semi-arid climate, which means it's dry with low humidity. This dry air is lighter, so it rises easily, making the air pressure lower and causing more weather changes.