Marion County Climate
Marion County, Missouri
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.0°F
Annual Precip
39.9"
Annual Snowfall
12.5"
Extreme Heat Days
25
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,741
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Marion County
Climate Verdict
Marion County has a mild, with an average annual temperature of 53.0°F, moderate rainfall of 39.9 inches per year, occasional hot days — 24.5 per year above 90°F, light snow averaging 12.5 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.3°F. summers are warm — July averages 76.5°F. Residents experience a substantial 50°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Marion County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Marion County closely matches the Missouri statewide average temperature of 54.9°F, it is somewhat drier than average for Missouri.
Climate Profile
About Marion County Weather
Closer to the National Average
Marion County maintains an annual average temperature of 53.0°F, aligning closely with the national median. The county receives 39.9 inches of annual precipitation, which is lower than the Missouri average of 43.8 inches. This creates a slightly drier profile compared to many other Midwestern counties.
Cooler than the State Median
At 53.0°F, Marion County sits nearly two degrees below the Missouri state average of 54.9°F. This cooler ranking reflects its position in the northeastern part of the state. Winter temperatures here are significantly sharper than in southern Missouri.
Northeastern Missouri Climate Consistency
Marion County is nearly identical in temperature to neighboring Monroe County, which averages 52.9°F. However, Marion receives less precipitation than Monroe, trailing by nearly two inches annually. Both counties share a similar July peak of roughly 76°F.
Cold Winters and Snowy Days
January is cold with an average of 26.3°F, and the county receives 12.5 inches of annual snowfall. Summer brings 25 days of extreme heat above 90°F. The transition from a winter low of 29.4°F to a summer high of 74.7°F marks a classic four-season cycle.
Winterize for Significant Snow
Residents must prepare for 12.5 inches of snow by maintaining reliable shovels and winter tires. Insulation is critical as January temperatures frequently drop below freezing. Summer planning should account for roughly 25 days of 90-degree heat.
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.