Washington County Climate
Washington County, Nebraska
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
49.8°F
Annual Precip
33.4"
Annual Snowfall
—
Extreme Heat Days
20
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
3,248
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Washington County
Climate Verdict
Washington County has a cool, averaging 49.8°F annually, moderate rainfall of 33.4 inches per year, occasional hot days — 20.3 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 21.8°F. summers are warm — July averages 74.8°F. Residents experience a substantial 53°F difference between winter and summer.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Washington County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Washington County closely matches the Nebraska statewide average temperature of 49.7°F, it is also noticeably wetter, receiving 7.5 inches more precipitation than the state average.
Climate Profile
About Washington County Weather
A humid and temperate border
Washington County has an annual average temperature of 49.8°F, placing it near the national median. It is one of the wettest areas in the region, receiving 33.4 inches of annual precipitation. This abundance of moisture supports a lush, productive environment.
Nebraska's standard for temperature
Washington County's 49.8°F average perfectly aligns with the Nebraska state average of 49.7°F. However, it far exceeds the state's average rainfall by 7.5 inches. This makes it one of the most humid and rainfall-heavy counties in the entire state.
The wettest in the region
Compared to western Sioux County's 16.5 inches, Washington's 33.4 inches of rain is a stark contrast. It is also significantly more humid than central counties like Valley or Sherman. This high moisture level defines the county's local ecosystem and farming conditions.
Mild summers and cold winters
Summer heat is relatively moderate here, with only 20 days exceeding 90°F. While snowfall data is currently unavailable, January temperatures average 21.8°F, indicating cold winter conditions. The high annual precipitation suggests that winter likely brings frequent mixed-precipitation events.
Prioritize drainage and moisture control
With over 33 inches of rain, proper basement waterproofing and yard drainage are critical for homeowners. Cooling needs are lower than elsewhere in the state, as the county only sees 20 extreme heat days. Residents should still prepare for significant winter cold as January averages dip into the low 20s.
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.