Johnson County Climate
Johnson County, Nebraska
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.3°F
Annual Precip
31.8"
Annual Snowfall
21.7"
Extreme Heat Days
35
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
3,502
Supports most vegetables & fruits
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 mild, with an average annual temperature of 51.3°F, moderate rainfall of 31.8 inches per year, occasional hot days — 34.9 per year above 90°F, moderate snowfall of 21.7 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 24.0°F. summers are warm — July averages 76.5°F. Residents experience a substantial 53°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Johnson County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Johnson County closely matches the Nebraska statewide average temperature of 49.7°F, it is also noticeably wetter, receiving 5.9 inches more precipitation than the state average.
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.
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.