Henry County Climate
Henry County, Missouri
Avg Annual Temp
55.5°F
Annual Precip
43.3"
Annual Snowfall
11.1"
Extreme Heat Days
35.35
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.