Johnson County Climate
Johnson County, Nebraska
Avg Annual Temp
51.3°F
Annual Precip
31.8"
Annual Snowfall
21.7"
Extreme Heat Days
34.9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Johnson County Weather
Cooler than the national median
Johnson County's average annual temperature of 51.3°F sits below the national median. This humid continental region experiences a typical four-season cycle.
Warmer than the Nebraska average
The county's 51.3°F average exceeds the state-wide average of 49.7°F. Its southeastern location makes it one of the warmer spots in Nebraska.
Wettest in the immediate region
With 31.8 inches of annual rain, Johnson is wetter than Lancaster County's 31.0 inches. It receives significantly more precipitation than Kearney County's 25.7 inches.
Hot summers and moderate snow
Residents face 35 extreme heat days annually when temperatures exceed 90°F. Winter brings an average of 21.7 inches of snow and a January average of 24.0°F.
Prepare for humidity and heat
Heavy-duty cooling systems are vital to manage the 35 days of extreme heat. Residents should also maintain clear drainage systems for the high 31.8-inch annual precipitation.
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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.