San Juan County Climate
San Juan County, Utah
Avg Annual Temp
52.9°F
Annual Precip
10.7"
Annual Snowfall
25.3"
Extreme Heat Days
57.01818181818182
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About San Juan County Weather
A Typical High Desert Profile
San Juan County's average temperature of 52.9°F aligns closely with the national median. This high-desert region combines moderate annual averages with sharp daily temperature swings.
Warm and Arid Southeast Corner
The county ranks as one of Utah's warmer regions, exceeding the state average of 48.9°F by four degrees. It is significantly drier than the state average, receiving only 10.7 inches of precipitation annually.
Drier than the Interior Basin
San Juan is warmer and drier than its northern neighbors in the interior. Its 25.3 inches of snow is less than half of what Sanpete County receives further to the northwest.
Scorching Summers and Dry Winters
Summers are characterized by 57 days of extreme heat reaching 90°F or higher. Winters are relatively dry and mild for Utah, with a January average of 30.4°F and limited snowfall.
Prioritize Cooling and Water
Cooling systems are a priority to handle nearly two months of extreme summer heat. Residents should also invest in xeriscaping and water storage solutions due to the low 10.7 inches of annual rainfall.
Frequently Asked Questions
What is the average temperature in San Juan County?
How much rain does San Juan County get?
Does it snow in San Juan County?
How hot does San Juan County get in summer?
How cold are winters in San Juan County?
Track your own weather in San Juan 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.