Jefferson County Climate
Jefferson County, Arkansas
Avg Annual Temp
63.0°F
Annual Precip
52.2"
Annual Snowfall
2.5"
Extreme Heat Days
73.25
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.