Johnson County Climate
Johnson County, Arkansas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
60.3°F
Annual Precip
51.7"
Annual Snowfall
1.9"
Extreme Heat Days
54
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8a
Minimum winter temperature range for plant survival
4,973
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Johnson County
Climate Verdict
Johnson County has a warm, averaging 60.3°F year-round, moderately wet with 51.7 inches of annual precipitation, occasional hot days — 53.65 per year above 90°F, light snow averaging 1.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 38.3°F. summers are hot, with July averaging 80.8°F. The 43°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
Johnson County closely matches the Arkansas statewide average temperature of 61.0°F.
Climate Profile
About Johnson County Weather
A Mild Climate Above National Averages
Johnson County averages 60.3°F annually, staying notably warmer than the typical United States county. The climate is characterized by four distinct seasons with a heavy emphasis on summer heat.
Consistent with Arkansas Central Averages
The county's 60.3°F annual temperature is just below the Arkansas average of 61.0°F. It experiences typical state weather patterns, including humid summers and moderate precipitation.
Standard Precipitation for the River Valley
Johnson County sees 51.7 inches of annual precipitation, which is just under the state average of 52.4 inches. This rainfall keeps the landscape lush but falls short of the higher totals found in the southern delta.
Scorching Summers and Minimal Snow
The county records 54 days over 90°F annually, while winter snowfall typically totals only 1.9 inches. July is the peak of the heat with an average temperature of 80.8°F.
Equip Your Home for Peak Summer
Sun protection and shade are vital for the 54 days of extreme heat each year. Residents should also prepare for 51.7 inches of rain by ensuring roofs and seals are in good condition.
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.