Summit County Climate
Summit County, Utah
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
44.1°F
Annual Precip
18.0"
Annual Snowfall
92.9"
Extreme Heat Days
19
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
1,675
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Summit County
Climate Verdict
Summit County has a cool, averaging 44.1°F annually, semi-arid conditions with only 18.0 inches of annual precipitation, rare extreme heat with only 19.216666666666665 days above 90°F annually, heavy winter snowfall averaging 92.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 23.6°F. summers are pleasantly cool with July averaging 66.7°F. The 43°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Summit County is 4.8°F cooler than the Utah statewide average of 48.9°F, it is somewhat wetter than average for Utah, the county experiences 23.802051425585898 fewer extreme heat days than the state average.
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 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.