Johnson County Climate
Johnson County, Arkansas
Avg Annual Temp
60.3°F
Annual Precip
51.7"
Annual Snowfall
1.9"
Extreme Heat Days
53.65
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.