Linn County Climate
Linn County, Missouri
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.7°F
Annual Precip
40.6"
Annual Snowfall
18.9"
Extreme Heat Days
25
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,640
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Linn County
Climate Verdict
Linn County has a mild, with an average annual temperature of 52.7°F, moderately wet with 40.6 inches of annual precipitation, occasional hot days — 24.7 per year above 90°F, light snow averaging 18.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 26.1°F. summers are warm — July averages 76.2°F. Residents experience a substantial 50°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Linn County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Linn County closely matches the Missouri statewide average temperature of 54.9°F, it is somewhat drier than average for Missouri.
Climate Profile
About Linn County Weather
Cooler Temperatures on the Northern Plains
Linn is notably cooler than the national median at 52.7°F. This northern Missouri county experiences a pronounced continental climate with long winters.
A Cooler and Drier Northern Profile
It is significantly cooler than the 54.9°F state average and receives less rain than the state mean. It represents the cooler, drier characteristics of North Missouri.
Among the Highest Snowfall Totals
Linn sees 18.9 inches of annual snowfall, which is among the highest in the region. It experiences 11 fewer extreme heat days than Lafayette to its south.
Long Winters and Mild Summers
Winter is the dominant season, with temperatures averaging 29.4°F and nearly 19 inches of snow. Summer is mild, with only 25 days reaching 90°F.
Focus on Efficient Winter Heating
Prioritize high-efficiency heating and reliable snow removal equipment for the snowy winter months. Summer cooling is less of a financial burden here than in the south.
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.