Frost dates in Michigan

Across Michigan, the typical last spring frost is around May 3 and the first fall frost around Oct 13. 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 26 and May 23, and its first fall frosts between Sep 28 and Oct 24.

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 Michigan: zone 4a, zone 4b, zone 5a, zone 5b, zone 6a, zone 6b, zone 7a

Frost dates by county in Michigan

CountyLast spring frostFirst fall frostGrowing season
AlconaMay 17Oct 16About 152 days
AlgerMay 27Sep 28About 124 days
AlleganMay 4Oct 15About 164 days
AlpenaMay 17Oct 17About 153 days
AntrimMay 23Oct 2About 132 days
ArenacMay 5Oct 10About 158 days
BaragaMay 31Sep 23About 115 days
BarryMay 3Oct 12About 162 days
BayMay 3Oct 14About 164 days
BenzieMay 7Oct 26About 172 days
BerrienApr 27Oct 25About 181 days
BranchMay 2Oct 13About 164 days
CalhounApr 30Oct 19About 172 days
CassApr 30Oct 17About 170 days
CharlevoixMay 16Oct 9About 146 days
CheboyganMay 31Sep 18About 110 days
ChippewaMay 24Oct 1About 130 days
ClareMay 9Oct 4About 148 days
ClintonApr 28Oct 24About 179 days
CrawfordMay 23Oct 7About 137 days
DeltaMay 16Oct 4About 141 days
DickinsonMay 17Oct 1About 137 days
EatonMay 1Oct 14About 166 days
EmmetMay 16Oct 9About 146 days
GeneseeMay 6Oct 10About 157 days
GladwinMay 9Oct 4About 148 days
GogebicMay 19Sep 28About 132 days
Grand TraverseMay 12Oct 16About 157 days
GratiotMay 1Oct 13About 165 days
HillsdaleMay 3Oct 12About 162 days
HoughtonMay 17Oct 1About 137 days
HuronMay 7Oct 17About 163 days
InghamApr 28Oct 17About 172 days
IoniaMay 3Oct 12About 162 days
IoscoMay 16Oct 5About 142 days
IronJun 4Sep 10About 98 days
IsabellaApr 30Oct 20About 173 days
JacksonMay 1Oct 14About 166 days
KalamazooApr 28Oct 18About 173 days
KalkaskaMay 24Oct 1About 130 days
KentMay 6Oct 10About 157 days
KeweenawMay 17Oct 15About 151 days
LakeMay 28Oct 2About 127 days
LapeerMay 4Oct 14About 163 days
LeelanauMay 22Oct 15About 146 days
LenaweeMay 3Oct 13About 163 days
LivingstonMay 4Oct 12About 161 days
LuceMay 21Oct 5About 137 days
MackinacMay 26Sep 30About 127 days
MacombApr 30Oct 24About 177 days
ManisteeMay 14Oct 12About 151 days
MarquetteMay 22Oct 2About 133 days
MasonMay 17Oct 7About 143 days
MecostaMay 13Oct 2About 142 days
MenomineeMay 22Sep 27About 128 days
MidlandMay 9Oct 16About 160 days
MissaukeeMay 30Sep 26About 119 days
MonroeApr 27Oct 21About 177 days
MontcalmMay 18Sep 28About 133 days
MontmorencyMay 22Sep 27About 128 days
MuskegonMay 8Oct 19About 164 days
NewaygoMay 13Oct 2About 142 days
OaklandApr 29Oct 20About 174 days
OceanaMay 17Oct 7About 143 days
OgemawMay 21Sep 29About 131 days
OntonagonMay 26Oct 1About 128 days
OsceolaMay 13Oct 2About 142 days
OscodaMay 19Oct 2About 136 days
OtsegoMay 22Sep 30About 131 days
OttawaApr 30Oct 24About 177 days
Presque IsleMay 13Oct 3About 143 days
RoscommonMay 19Sep 23About 127 days
SaginawApr 29Oct 17About 171 days
SanilacMay 4Oct 16About 165 days
SchoolcraftMay 26Oct 10About 137 days
ShiawasseeMay 3Oct 12About 162 days
St. ClairMay 1Oct 20About 172 days
St. JosephApr 30Oct 17About 170 days
TuscolaMay 7Oct 9About 155 days
Van BurenMay 7Oct 11About 157 days
WashtenawMay 3Oct 12About 162 days
WayneApr 27Oct 25About 181 days
WexfordMay 19Oct 1About 135 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