Union County Climate
Union County, Arkansas
Avg Annual Temp
63.7°F
Annual Precip
52.8"
Annual Snowfall
0.8"
Extreme Heat Days
82.05000000000001
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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
What is the average temperature in Union County?
How much rain does Union County get?
Does it snow in Union County?
How hot does Union County get in summer?
How cold are winters in Union County?
Track your own weather in Union County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.