Jefferson County Climate
Jefferson County, Nebraska
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
51.6°F
Annual Precip
32.4"
Annual Snowfall
20.7"
Extreme Heat Days
42
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
3,501
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Jefferson County
Climate Verdict
Jefferson County has a mild, with an average annual temperature of 51.6°F, moderate rainfall of 32.4 inches per year, occasional hot days — 41.7 per year above 90°F, moderate snowfall of 20.7 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 25.1°F. summers are warm — July averages 76.6°F. Residents experience a substantial 51°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Jefferson County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Jefferson County closely matches the Nebraska statewide average temperature of 49.7°F, it is also noticeably wetter, receiving 6.5 inches more precipitation than the state average.
Climate Profile
About Jefferson County Weather
A Moist and Temperate Climate
Jefferson County averages 51.6°F annually, roughly 2.4 degrees below the national median. It is one of the more humid and precipitation-rich areas in the Great Plains region.
Nebraska’s Southeastern Wet Zone
With 32.4 inches of annual precipitation, Jefferson is significantly wetter than the Nebraska average of 25.9 inches. It also runs warmer than the state average of 49.7°F.
Higher Rainfall, Lower Snowfall
The county receives only 20.7 inches of snow, the lowest among its regional peers. Instead, it gets more of its annual moisture through rain, totaling over 32 inches.
Steamy Summers and Mild Winters
Summer brings 42 days of extreme heat and a July average of 76.6°F. Winters are relatively mild for Nebraska, with a Dec-Feb average temperature of 27.8°F.
Manage Moisture and Summer Heat
Dehumidifiers and good drainage systems are essential to handle the high 32.4-inch annual precipitation. HVAC systems should be serviced annually to cope with six weeks of 90-degree summer days.
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.