Onondaga County Climate
Onondaga County, New York
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
47.5°F
Annual Precip
44.4"
Annual Snowfall
104.0"
Extreme Heat Days
9
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
2,510
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Onondaga County
Climate Verdict
Onondaga County has a cool, averaging 47.5°F annually, moderately wet with 44.4 inches of annual precipitation, rare extreme heat with only 8.55 days above 90°F annually, heavy winter snowfall averaging 104.0 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 23.0°F. summers are warm — July averages 70.7°F. The 48°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
Onondaga County closely matches the New York statewide average temperature of 47.5°F.
Climate Profile
About Onondaga County Weather
A Classic Northeast Humid Continental Climate
Onondaga County’s average annual temperature of 47.5°F sits about 7 degrees below the national median. This reflects a typical temperate climate with significant seasonal variation.
Matching the New York State Average
The county’s 47.5°F average almost perfectly mirrors the New York state average of 47.4°F. It represents the quintessential climate profile for central New York.
Snowier Than Its Southern Neighbors
While its 47.5°F average is similar to Oswego, Onondaga sees slightly fewer extreme snow events than its neighbor to the north. However, it remains much colder and snowier than the Hudson Valley counties.
Major Snowfall and Mild Summer Heat
Winter is defined by a staggering 104 inches of annual snowfall and an average low of 23°F in January. Summers stay comfortable with a July average of 70.7°F and only 9 days above 90°F.
Prepare for Serious Winter Maintenance
Residents must invest in high-quality snow removal equipment to handle the 100-plus inches of annual snow. Home heating systems should be rated for prolonged sub-freezing stretches during the 25.6°F average winter.
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.