Ohio Hardiness Zones

Ohio covers USDA plant hardiness zones 6a to 7a on the 2023 map, so its coldest areas average −10 to −5 °F on the coldest winter night. Find your zone by ZIP code, or pick a city below for its zone, sunrise and daylight by month.

Ohio hardiness zone map

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This is not the official USDA Plant Hardiness Zone Map. Zones are derived from the official 2023 dataset, resampled to about 2 km. Dots mark cities with their own page.

Source: USDA Plant Hardiness Zone Map, 2023. Agricultural Research Service, U.S. Department of Agriculture, planthardiness.ars.usda.gov. Underlying data © PRISM Group, Oregon State University, prism.oregonstate.edu, accessed 2026-08-30.

Zones and daylight by city

City	Zone	Coldest night	Longest day	Shortest day
Columbus	6b	−5 to 0 °F	15h 01m	9h 20m
Cleveland	7a	0 to 5 °F	15h 11m	9h 10m
Cincinnati	6b	−5 to 0 °F	14h 55m	9h 25m
Toledo	6b	−5 to 0 °F	15h 12m	9h 09m
Akron	6b	−5 to 0 °F	15h 08m	9h 13m
Dayton	6b	−5 to 0 °F	15h 00m	9h 21m
Youngstown	6a	−10 to −5 °F	15h 08m	9h 13m
Canton	6b	−5 to 0 °F	15h 06m	9h 15m
Parma	6b	−5 to 0 °F	15h 10m	9h 11m
Athens	6b	−5 to 0 °F	14h 57m	9h 24m

Gardening in Ohio?

Your zone says what survives winter. Deconstruct Sun measures how many hours of direct sun your exact spot gets, so you can pick plants that thrive. Free on iPhone.

Questions

What hardiness zones are in Ohio?

Ohio spans USDA zones 6a to 7a on the 2023 map. Among its larger cities, Youngstown is coldest (zone 6a) and Cleveland is warmest (zone 7a).

How do I find my exact zone in Ohio?

Enter your ZIP code in the hardiness zone lookup on this site. It reads the 2023 USDA data for that ZIP and warns you if you are near a zone boundary.

How much sun do gardens in Ohio get?

In Columbus, an open spot gets up to 15.0 hours of daylight in June but only 9.3 in December. Trees and buildings cut that down, especially in winter. The Deconstruct Sun app measures the real direct-sun hours for one exact spot.