Barometric Pressure in Grimes, United States 
Pressure
1013 hPa
Temperature
15.0 ℃
Humidity
50%
Wind
3.0 m/s
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Forecast
Hourly Pressure Trends
Track the barometric pressure in Grimes hour by hour across the next 6 hourly readings.
Grimes, Iowa's air pressure changes because of its flat geography, which lets winds easily move in and out. In winter, cold Arctic air makes air pressure low, causing cold fronts. In summer, warm Gulf air makes air pressure high, causing hot and humid days. Grimes has a humid continental climate, with big air pressure swings between seasons.