Harrison County Climate
Harrison County, Missouri
Avg Annual Temp
51.8°F
Annual Precip
39.1"
Annual Snowfall
21.2"
Extreme Heat Days
23.7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Harrison County Weather
Cooler than the National Average
Harrison County's annual average of 51.8°F makes it one of the cooler locations in the region. It maintains a steady 39.1 inches of precipitation, supporting its local agricultural economy.
One of Missouri's Coldest Counties
Averaging 51.8°F, Harrison County sits more than three degrees below the Missouri state average of 54.9°F. It represents the colder extreme of Missouri's climate spectrum.
The Snow Capital of the Region
Harrison County receives 21.2 inches of snow, which is significantly higher than many surrounding counties. It also experiences only 24 extreme heat days, fewer than its neighbors to the south.
Rigorous Winters and Mild Summers
Winter dominates the calendar with an average temperature of 27.9°F and substantial snowfall. Summer stays relatively comfortable with a July average of 76.4°F and fewer extreme heat events.
Invest in Heavy Winter Gear
The 21.2 inches of annual snow requires high-quality shovels or snow blowers for every household. Energy bills often peak in winter here, so robust heating systems and insulation are vital.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.