Marion County Climate
Marion County, Missouri
Avg Annual Temp
53.0°F
Annual Precip
39.9"
Annual Snowfall
12.5"
Extreme Heat Days
24.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.