Frost dates in Ohio

Across Ohio, the typical last spring frost is around Apr 24 and the first fall frost around Oct 22. Your own dates depend on where you are in the state; find your county below.

Most of the state's last spring frosts fall between Apr 17 and Apr 30, and its first fall frosts between Oct 14 and Oct 29.

These are the dates with a 50% chance of a 32°F frost on or after (spring) or on or before (fall), so plan tender crops a week or two after the spring date and keep row cover handy. For dates at your exact ZIP code, use the zone and frost date lookup; for what to plant when, see the planting guide by frost date.

Hardiness zones in Ohio: zone 5b, zone 6a, zone 6b, zone 7a

Frost dates by county in Ohio

CountyLast spring frostFirst fall frostGrowing season
AdamsApr 24Oct 22About 181 days
AllenApr 23Oct 24About 184 days
AshlandApr 30Oct 15About 168 days
AshtabulaMay 4Oct 18About 167 days
AthensApr 25Oct 23About 181 days
AuglaizeApr 24Oct 22About 181 days
BelmontApr 21Oct 25About 187 days
BrownApr 29Oct 11About 165 days
ButlerApr 22Oct 19About 180 days
CarrollApr 30Oct 15About 168 days
ChampaignApr 24Oct 19About 178 days
ClarkApr 25Oct 19About 177 days
ClermontApr 23Oct 18About 178 days
ClintonApr 20Oct 20About 183 days
ColumbianaMay 2Oct 13About 164 days
CoshoctonApr 27Oct 18About 174 days
CrawfordApr 19Oct 27About 191 days
CuyahogaApr 8Nov 12About 218 days
DarkeApr 21Oct 20About 182 days
DefianceApr 28Oct 17About 172 days
DelawareApr 22Oct 24About 185 days
ErieApr 24Oct 25About 184 days
FairfieldApr 23Oct 19About 179 days
FayetteApr 23Oct 21About 181 days
FranklinApr 22Oct 24About 185 days
FultonApr 29Oct 16About 170 days
GalliaApr 18Oct 28About 193 days
GeaugaMay 5Oct 18About 166 days
GreeneApr 18Oct 24About 189 days
GuernseyApr 28Oct 17About 172 days
HamiltonApr 16Oct 25About 192 days
HancockApr 19Oct 23About 187 days
HardinApr 22Oct 24About 185 days
HarrisonApr 21Oct 25About 187 days
HenryApr 24Oct 21About 180 days
HighlandApr 24Oct 20About 179 days
HockingApr 30Oct 14About 167 days
HolmesMay 2Oct 14About 165 days
HuronApr 25Oct 25About 183 days
JacksonApr 22Oct 21About 182 days
JeffersonApr 22Oct 28About 189 days
KnoxMay 2Oct 8About 159 days
LakeApr 26Nov 9About 197 days
LawrenceApr 22Oct 23About 184 days
LickingApr 22Oct 18About 179 days
LoganApr 26Oct 20About 177 days
LorainApr 24Oct 24About 183 days
LucasApr 20Oct 27About 190 days
MadisonApr 24Oct 18About 177 days
MahoningMay 2Oct 13About 164 days
MarionApr 25Oct 20About 178 days
MedinaApr 29Oct 19About 173 days
MeigsApr 27Oct 14About 170 days
MercerApr 27Oct 19About 175 days
MiamiApr 18Oct 23About 188 days
MonroeApr 26Oct 26About 183 days
MontgomeryApr 18Oct 25About 190 days
MorganApr 27Oct 21About 177 days
MorrowApr 26Oct 20About 177 days
MuskingumApr 27Oct 18About 174 days
NobleApr 30Oct 14About 167 days
OttawaApr 20Oct 27About 190 days
PauldingApr 25Oct 19About 177 days
PerryApr 30Oct 17About 170 days
PickawayApr 17Oct 28About 194 days
PikeApr 21Oct 22About 184 days
PortageApr 21Oct 29About 191 days
PrebleApr 25Oct 20About 178 days
PutnamApr 23Oct 22About 182 days
RichlandApr 30Oct 22About 175 days
RossApr 20Oct 22About 185 days
SanduskyApr 21Oct 24About 186 days
SciotoApr 21Oct 24About 186 days
SenecaApr 23Oct 23About 183 days
ShelbyApr 27Oct 20About 176 days
StarkApr 24Oct 26About 185 days
SummitApr 24Oct 26About 185 days
TrumbullMay 1Oct 17About 169 days
TuscarawasApr 29Oct 15About 169 days
UnionApr 19Oct 26About 190 days
Van WertApr 21Oct 26About 188 days
VintonApr 27Oct 14About 170 days
WarrenApr 23Oct 19About 179 days
WashingtonApr 23Oct 26About 186 days
WayneApr 29Oct 14About 168 days
WilliamsApr 28Oct 18About 173 days
WoodApr 22Oct 25About 186 days
WyandotApr 29Oct 17About 171 days

Source: NOAA NCEI U.S. Climate Normals 1991–2020, 50% probability of 32°F, from the weather station nearest each ZIP code; each county shows the middle value across its ZIP codes. Hills, valleys and cities can run a week or more earlier or later.

Frost dates for other states