Union County Climate
Union County, Arkansas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
63.7°F
Annual Precip
52.8"
Annual Snowfall
0.8"
Extreme Heat Days
82
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,717
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Union County
Climate Verdict
Union County has a warm, averaging 63.7°F year-round, moderately wet with 52.8 inches of annual precipitation, significant summer heat with 82.05000000000001 days annually above 90°F, light snow averaging 0.8 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 44.1°F. summers are hot, with July averaging 82.1°F. The 38°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Union County closely matches the Arkansas statewide average temperature of 61.0°F, the county experiences 17.935000000000002 more extreme heat days than the state average.
Climate Profile
About Union County Weather
A Warm Southern Climate
Union County is quite warm, with an annual average temperature of 63.7°F that far exceeds the national median. It is also a very wet region, logging 52.8 inches of annual precipitation.
Among the Warmest in Arkansas
This county is 2.7 degrees warmer than the Arkansas state average of 61.0°F. It represents the hotter, southern tier of the state's climate profile.
Hotter and Drier Than the North
Union County faces 82 days of extreme heat, which is significantly more than Washington County's 39 days. It also receives almost no snow, averaging just 0.8 inches annually.
Intense Summers and Soft Winters
Summers are long and hot, averaging 80.8°F with nearly three months of days over 90°F. Winters are very mild, with a January average temperature of 44.1°F.
Prepare for Sustained Heat
HVAC systems must be robust to handle 82 days of extreme heat annually. Outdoor activities should be planned for the early morning during the summer to avoid the 82.1°F July average.
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.