Henry County Climate
Henry County, Missouri
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
55.5°F
Annual Precip
43.3"
Annual Snowfall
11.1"
Extreme Heat Days
35
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
4,138
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Henry County
Climate Verdict
Henry County has a mild, with an average annual temperature of 55.5°F, moderately wet with 43.3 inches of annual precipitation, occasional hot days — 35.35 per year above 90°F, light snow averaging 11.1 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 30.4°F. summers are warm — July averages 78.7°F. The 48°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Henry County closely matches the Missouri statewide average temperature of 54.9°F.
Climate Profile
About Henry County Weather
Warm Midwestern Humid Climate
Henry County's annual average temperature of 55.5°F is slightly warmer than the national median. With 43.3 inches of annual rain, the county experiences a moist and productive climate.
Aligned with the Missouri Average
The county's 55.5°F average is very close to the state average of 54.9°F. It serves as a representative sample of Missouri's transition from northern cool to southern warmth.
Milder Winters than Northern Neighbors
Henry County sees only 11.1 inches of snow, much less than the 17-20 inches seen in northern Missouri. Its January average of 30.4°F is notably warmer than counties near the Iowa border.
Hot Summers and Manageable Winters
The area experiences 35 days of temperatures at or above 90°F, concentrated in the 78.7°F July peak. Winter stays above freezing on average, with a Dec-Feb mean of 33.3°F.
Managing Humidity and Summer Heat
With 35 extreme heat days and over 43 inches of rain, dehumidifiers and reliable AC are essential. The relatively low snowfall makes winter travel easier than in other parts of the state.
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.