Dallas County Climate
Dallas County, Missouri
Avg Annual Temp
55.0°F
Annual Precip
45.3"
Annual Snowfall
9.0"
Extreme Heat Days
33.7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Dallas County Weather
A typical American climate profile
Dallas County’s 55.0°F annual average temperature aligns closely with the national median. The region experiences a standard four-season continental climate with moderate variations.
Matching the Missouri baseline
The county’s average temperature of 55.0°F almost perfectly matches the state average of 54.9°F. Its 45.3 inches of annual rainfall is also near the state’s typical 43.8-inch mark.
Milder summers than western neighbors
Dallas County sees 34 extreme heat days per year, fewer than the 42 recorded in nearby Dade County. It also receives about 3.8 inches less snow than Dade annually.
Moderate snow and warm July peaks
Winter snowfall averages 9.0 inches, which is relatively light for the Midwest. July highs push the monthly average to 77.3°F, creating 34 days of 90°F temperatures.
Balance your home’s seasonal needs
A standard HVAC system is sufficient for the 34 days of extreme heat and mild 31.3°F January lows. Residents should keep a basic snow shovel ready for the occasional 9-inch annual accumulation.
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.