Onondaga County Climate
Onondaga County, New York
Avg Annual Temp
47.5°F
Annual Precip
44.4"
Annual Snowfall
104.0"
Extreme Heat Days
8.55
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.