Hamilton County Climate
Hamilton County, Ohio
Avg Annual Temp
54.5°F
Annual Precip
46.0"
Annual Snowfall
13.7"
Extreme Heat Days
24.96666666666667
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Hamilton County Weather
Cincinnati’s Humid Subtropical Influences
Hamilton County’s 54.5°F average annual temperature is notably warmer than the national median. This southern Ohio climate leans toward humid subtropical, characterized by long, warm summers.
Leading the State in Temperature
At 54.5°F, Hamilton is consistently warmer than the 51.5°F Ohio average. It ranks as one of the state's warmest regions due to its southern latitude and urban heat island effects.
Wetter and Warmer than Central Ohio
With 46 inches of annual precipitation, Hamilton is wetter than its northern neighbor, Greene County. It also experiences 25 extreme heat days, far exceeding the state average.
Steamier Summers and Shorter Winters
July averages reach a high of 75.8°F, and residents face 25 days over 90°F annually. Snowfall is light for Ohio, totaling only 13.7 inches per year.
Manage Humidity and High Heat
Homeowners should prioritize dehumidification and robust cooling systems to handle 25 extreme heat days. Winter gear needs are lower here, as annual snow only averages 13.7 inches.
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.