Union County Climate
Union County, New Mexico
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.4°F
Annual Precip
16.5"
Annual Snowfall
22.4"
Extreme Heat Days
42
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6b
Minimum winter temperature range for plant survival
3,078
Supports most vegetables & fruits
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 mild, with an average annual temperature of 52.4°F, semi-arid conditions with only 16.5 inches of annual precipitation, occasional hot days — 41.68333333333333 per year above 90°F, moderate snowfall of 22.4 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 33.3°F. summers are warm — July averages 73.3°F. The 40°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Union County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Union County closely matches the New Mexico statewide average temperature of 54.8°F, it is somewhat wetter than average for New Mexico, the county experiences 16.223522126022132 fewer extreme heat days than the state average.
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
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 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.