Harrison County Climate
Harrison County, Missouri
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.8°F
Annual Precip
39.1"
Annual Snowfall
21.2"
Extreme Heat Days
24
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
3,530
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Harrison County
Climate Verdict
Harrison County has a mild, with an average annual temperature of 51.8°F, moderate rainfall of 39.1 inches per year, occasional hot days — 23.7 per year above 90°F, moderate snowfall of 21.2 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 24.8°F. summers are warm — July averages 76.4°F. Residents experience a substantial 52°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Harrison County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Harrison County is 3.1°F cooler than the Missouri statewide average of 54.9°F, it is somewhat drier than average for Missouri.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.