Union County Climate
Union County, New Mexico
Avg Annual Temp
52.4°F
Annual Precip
16.5"
Annual Snowfall
22.4"
Extreme Heat Days
41.68333333333333
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Union County Weather
Windy Plains and Moderate Temps
Union County's annual average temperature of 52.4°F is just below the national median. It is wetter than much of the state, receiving 16.5 inches of precipitation.
Cooler and Wetter Than Average
At 52.4°F, the county is cooler than the 54.8°F state average. It also exceeds the state's average rainfall by 2.5 inches, making it a productive agricultural zone.
Consistent With the High Plains
Union receives 22.4 inches of snow, which is more than the 20.4 inches in San Miguel. It faces 42 extreme heat days, a count similar to its western neighbors.
Four Distinct Plains Seasons
July averages 73.3°F with 42 days reaching 90°F, while winter features 22.4 inches of snow. January is cold, with temperatures averaging 33.3°F.
Prepare for Snow and Wind
Solid home insulation is needed for the 33.3°F January lows and frequent snow. Residents should plan for 42 days of heat by using effective cooling and ventilation.
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.