Jefferson County Climate
Jefferson County, Arkansas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
63.0°F
Annual Precip
52.2"
Annual Snowfall
2.5"
Extreme Heat Days
73
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8a
Minimum winter temperature range for plant survival
5,620
Excellent for heat-loving crops
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 warm, averaging 63.0°F year-round, moderately wet with 52.2 inches of annual precipitation, significant summer heat with 73.25 days annually above 90°F, light snow averaging 2.5 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 42.6°F. summers are hot, with July averaging 82.2°F. The 40°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Jefferson County closely matches the Arkansas statewide average temperature of 61.0°F.
Climate Profile
About Jefferson County Weather
Deep South Warmth in Jefferson County
With an annual average temperature of 63.0°F, Jefferson County is significantly warmer than the national median. This subtropical environment features long, humid summers and short, mild winters.
Ranking Among Arkansas's Warmer Counties
Jefferson County sits two degrees above the state average of 61.0°F. Its position in the Arkansas Delta contributes to higher heat retention and humidity levels compared to northern counties.
High Rainfall Totals Across the Region
The county receives 52.2 inches of annual precipitation, nearly matching the Arkansas average of 52.4 inches. This consistent rainfall supports the region's agricultural roots but increases local flood risks.
Frequent Extreme Heat and Low Snowfall
Summer dominates the calendar with 73 days reaching at least 90°F and a July average of 82.2°F. Winter remains temperate, as the county only sees an average of 2.5 inches of snowfall per year.
Prepare for Intense Summer Humidity
With 73 extreme heat days, residents need reliable air conditioning and proper hydration for outdoor activities. The 52.2 inches of annual rain also requires a robust home drainage plan to prevent water damage.
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.