Dallas County Climate
Dallas County, Missouri
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
55.0°F
Annual Precip
45.3"
Annual Snowfall
9.0"
Extreme Heat Days
34
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,919
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Dallas County
Climate Verdict
Dallas County has a mild, with an average annual temperature of 55.0°F, moderately wet with 45.3 inches of annual precipitation, occasional hot days — 33.7 per year above 90°F, light snow averaging 9.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 31.3°F. summers are warm — July averages 77.3°F. The 46°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
Dallas County closely matches the Missouri statewide average temperature of 54.9°F.
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 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.