Union County Climate
Union County, North Carolina
Avg Annual Temp
61.0°F
Annual Precip
42.9"
Annual Snowfall
2.1"
Extreme Heat Days
52.95
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Union County Weather
Warm Southern Climate Exceeds National Median
Union County's average annual temperature of 61.0°F is notably higher than the median for all U.S. counties. This reflects a typical Southern climate with long summers and relatively short, mild winters.
Warmer and Drier Than State Averages
Union County stays warmer than the state average of 59.3°F, while its 42.9 inches of annual rain is significantly lower than the North Carolina average of 51.5 inches. This makes it one of the drier counties in the state's southern region.
A Regional Leader in Summer Heat
With 53 extreme heat days annually, Union County faces more 90°F days than many of its immediate neighbors in the Piedmont. Its July average of 79.8°F highlights a peak summer intensity that defines the local weather experience.
Intense Summer Heat and Minimal Snow
Summers are hot with an average of 78.2°F and frequent spikes into the 90s. Winters are mild at 43.9°F on average, producing only 2.1 inches of snowfall for the entire season.
Prioritize Heat Safety and Irrigation
With 53 days of extreme heat, residents need high-efficiency cooling and smart hydration habits. The relatively low 42.9 inches of rain means gardeners and farmers should plan for supplemental irrigation during the peak summer months.
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.