Summit County Climate
Summit County, Utah
Avg Annual Temp
44.1°F
Annual Precip
18.0"
Annual Snowfall
92.9"
Extreme Heat Days
19.216666666666665
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Summit County Weather
Alpine Cold and High Snow
Summit County's 44.1°F annual average is nearly 10 degrees colder than the national median. This high-altitude mountain climate is defined by long winters and brief, cool summers.
Colder and Wetter Than Most
Summit is one of Utah's coolest counties, sitting nearly five degrees below the state average of 48.9°F. Its 18 inches of annual precipitation is significantly higher than the state average of 13.7 inches.
Vastly Different from the Valley
The county is much colder and snowier than neighboring Salt Lake County, receiving over 90 inches of snow. It shares a similar alpine profile with Rich County but remains slightly warmer.
A Winter-Dominant Climate
The county records 92.9 inches of annual snowfall and a January average of 23.6°F. Summers are exceptionally mild, with only 19 days of heat reaching 90°F.
Serious Winter Prep Required
High-performance winter gear and heavy-duty snow removal are non-negotiable for the nearly 93 inches of snow. Homeowners should prioritize insulation and pipe protection for the cold 24.8°F winter average.
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.