Barometric Pressure in Lewistown, United States 
999.9 hPa
15.7 ℃
18%
0.32 m/s
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The average pressure in Lewistown, Montana, United States today is , which is lower than normal. Pressure is trending falling.
Weather prediction: Very unsettled, rain
Rapid Pressure Changes
Rapid pressure changes detected in Lewistown, often a sign of approaching weather shifts. See the forecast chart or get pressure alerts.
- Rapid Rise : ()
- Rapid Rise : ()
- Rapid Fall : ()
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The daily total fluctuation in pressure in Lewistown is , with a low of and a high of .
Forecast
Hourly Pressure Trends
Track the barometric pressure in Lewistown hour by hour across the next 6 hourly readings.
Weather patterns in Lewistown make barometric pressure rise and fall. Changes in pressure bring different types of weather. Low pressure often means rain or stormy weather. High pressure means clear skies and fair weather.
Lewistown's high elevation and surrounding mountains affect atmospheric pressure. The landscape makes air move upward, which cools and condenses, changing pressure. This creates unique weather patterns in the area.
In winter, pressure is often low, bringing snow and cold air. In summer, pressure is often high, bringing warm and dry air. Spring and fall have more variable pressure, with changing weather.
Lewistown has a semi-arid climate with low humidity. This means big changes in barometric pressure can bring sudden weather shifts, making the weather feel unpredictable and exciting.