San Juan County Climate
San Juan County, New Mexico
Avg Annual Temp
52.3°F
Annual Precip
9.2"
Annual Snowfall
8.8"
Extreme Heat Days
52.787499999999994
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About San Juan County Weather
Arid High Desert Extremes
San Juan County averages 52.3°F, falling slightly below the national median temperature. It is exceptionally dry, receiving only 9.2 inches of annual precipitation.
Drier Than the State Average
San Juan's 9.2 inches of annual precipitation is well below the New Mexico average of 14.0 inches. Its 52.3°F annual temperature is also slightly cooler than the state average of 54.8°F.
Cooler and Drier Than the South
San Juan is much drier than neighboring McKinley County, which receives 12.8 inches of rain. It also experiences 53 heat days, less than half of the 111 days recorded in southern Luna County.
Moderate Summers and Dry Winters
July averages 75.4°F with roughly 53 days of extreme heat per year. Winters are cold and dry, averaging 32.4°F with only 8.8 inches of annual snowfall.
Prioritize Water Conservation
With only 9.2 inches of rain, xeriscaping and water efficiency are essential for every household. Prepare for 53 days of heat above 90°F, but remember that winter nights frequently drop below freezing.
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.