Clermont County Climate
Clermont County, Ohio
Avg Annual Temp
53.8°F
Annual Precip
—
Annual Snowfall
—
Extreme Heat Days
27.8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Precipitation data coming soon
Seasonal Overview
National Comparison
Data pending
Climate Profile
About Clermont County Weather
Southern Ohio’s Warmer Edge
Clermont County averages 53.8°F, making it warmer than the national median for temperate zones. It occupies a humid continental zone that frequently feels the influence of warmer southern air masses.
One of Ohio’s Warmest Counties
Averaging 53.8°F, Clermont is significantly warmer than the Ohio state average of 51.5°F. This temperature gap reflects its position in the sunnier, southern portion of the state.
Matching the Butler Heat
Clermont mirrors Butler County’s warmth but is considerably hotter than Clinton County, which averages 52.3°F. It experiences more than double the extreme heat days found in northern counties like Coshocton.
A Long Summer Season
The county endures 28 days of temperatures at or above 90°F, contributing to a July average of 75.4°F. Winter remains mild for the state, with a relatively warm December-to-February average of 32.8°F.
Focus on Heat Management
Although snowfall and precipitation records are limited, the 28 extreme heat days make cooling systems a top priority. Residents should plan for higher electricity demand during the peak summer months of June through August.
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.