Ashtabula County Climate
Ashtabula County, Ohio
Avg Annual Temp
48.3°F
Annual Precip
42.0"
Annual Snowfall
89.9"
Extreme Heat Days
6.2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Ashtabula County Weather
Extreme Snowfall in the Snowbelt
Ashtabula County averages a chilly 48.3°F annually, well below the national median. It is defined globally by its massive lake-effect precipitation patterns.
Ohio's Frozen North Coast
The county is significantly colder than the state average of 51.5°F. Its 89.9 inches of annual snow is the highest in the state, dwarfing the averages of central and southern counties.
The Region's Snow Leader
Ashtabula's 89.9 inches of snow is more than five times what residents in Athens County see. Its July average of 70.0°F is also much cooler than its inland neighbors.
Mild Summers and Intense Winters
Summer offers relief with only 6 days above 90°F and an average temp of 68.1°F. However, winter dominates the calendar with heavy snow and a 27.7°F average.
Invest in Heavy Snow Gear
A high-stage snowblower and winter tires are essential for the nearly 90 inches of annual snowfall. Residents benefit from lower summer cooling costs due to the lake-cooled air.
Frequently Asked Questions
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Track your own weather in Ashtabula County
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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.