When to plant Watermelon in Wisconsin

In spring, from May 1 – June 15 in Caledonia to June 1 – 15 in Wisconsin Rapids.

In fall, from May 15 – June 1 in Baraboo to July 1 – 15 in South Milwaukee.

USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Watermelon planting dates by place in Wisconsin
PlaceSpringFall
AllouezMay 15 – June 15June 1 – 15
AppletonMay 15 – June 15June 1 – 15
AshwaubenonMay 15 – June 15June 1 – 15
BarabooMay 15 – June 15May 15 – June 1
Beaver DamMay 15 – June 15June 1 – 15
BellevueMay 15 – June 15June 1 – 15
BeloitMay 15 – June 15June 1 – 15
BrookfieldMay 15 – June 15June 1 – 15
Brown DeerMay 15 – June 15June 15 – July 20
BurlingtonMay 15 – June 15June 1 – 15
CaledoniaMay 1 – June 15June 15 – July 20
CedarburgMay 1 – June 15June 15 – July 20
Chippewa FallsJune 1 – 15May 15 – June 1
CudahyMay 1 – June 15July 1 – 15
De PereMay 15 – June 15June 1 – 15
DeForestMay 15 – June 15June 1 – 15
Eau ClaireMay 1 – June 15June 1 – 15
ElkhornMay 15 – June 15June 1 – 15
FitchburgMay 15 – June 15June 1 – 15
Fond du LacMay 15 – June 15June 15 – July 20
Fort AtkinsonMay 15 – June 15June 1 – 15
Fox CrossingMay 15 – June 15June 1 – 15
FranklinMay 15 – June 15June 1 – 15
GermantownJune 1 – 15June 1 – 15
GlendaleMay 15 – June 15June 15 – July 20
GraftonMay 1 – June 15June 15 – July 20
Green BayJune 1 – 15June 1 – 15
GreendaleMay 15 – June 15June 1 – 15
GreenfieldMay 15 – June 15June 1 – 15
GreenvilleMay 15 – June 15June 1 – 15
HarrisonMay 15 – June 15June 1 – 15
HartfordJune 1 – 15May 15 – June 1
HartlandMay 15 – June 15June 1 – 15
HobartMay 15 – June 15June 1 – 15
HolmenMay 1 – June 15June 15 – July 20
HowardJune 1 – 15June 1 – 15
HudsonMay 1 – June 15June 15 – July 20
JanesvilleMay 15 – June 15June 1 – 15
KaukaunaMay 15 – June 15June 1 – 15
KenoshaMay 15 – June 15June 15 – July 20
La CrosseMay 15 – June 15June 1 – 15
LisbonMay 15 – June 15June 15 – July 20
Little ChuteMay 15 – June 15June 1 – 15
MadisonMay 15 – June 15June 1 – 15
ManitowocMay 15 – June 15June 15 – July 20
MarinetteMay 15 – June 15June 1 – 15
MarshfieldMay 15 – June 15May 15 – June 1
MenashaMay 15 – June 15June 1 – 15
Menomonee FallsJune 1 – 15June 1 – 15
MenomonieJune 1 – 15May 15 – June 1
MequonJune 1 – 15June 1 – 15
MiddletonMay 15 – June 15June 1 – 15
MilwaukeeMay 15 – June 15June 15 – July 20
MonroeMay 15 – June 15June 1 – 15
Mount PleasantMay 1 – June 15June 15 – July 20
MuskegoMay 15 – June 15June 1 – 15
NeenahMay 15 – June 15June 1 – 15
New BerlinMay 15 – June 15June 1 – 15
New RichmondMay 1 – June 15June 15 – July 20
Oak CreekMay 1 – June 15July 1 – 15
OconomowocMay 15 – June 15June 1 – 15
OnalaskaMay 1 – June 15June 15 – July 20
OregonMay 15 – June 15June 1 – 15
OshkoshMay 1 – June 15June 15 – July 20
PewaukeeMay 15 – June 15June 1 – 15
PlattevilleMay 15 – June 15June 1 – 15
Pleasant PrairieMay 1 – June 15July 1 – 15
PloverMay 15 – June 15June 1 – 15
Port WashingtonMay 15 – June 15June 15 – July 20
RacineMay 1 – June 15June 15 – July 20
ReedsburgMay 15 – June 15June 1 – 15
RichfieldMay 15 – June 15June 15 – July 20
River FallsJune 1 – 15May 15 – June 1
Salem LakesMay 15 – June 15June 1 – 15
SheboyganMay 1 – June 15June 15 – July 20
ShorewoodMay 15 – June 15June 15 – July 20
South MilwaukeeMay 1 – June 15July 1 – 15
Stevens PointMay 15 – June 15June 1 – 15
StoughtonMay 15 – June 15June 1 – 15
SuamicoJune 1 – 15June 1 – 15
Sun PrairieMay 15 – June 15June 1 – 15
SuperiorJune 1 – 15June 1 – 15
SussexMay 15 – June 15June 15 – July 20
Two RiversMay 15 – June 15June 15 – July 20
VeronaMay 15 – June 15June 1 – 15
WatertownMay 15 – June 15June 1 – 15
WaukeshaMay 15 – June 15June 1 – 15
WaunakeeMay 15 – June 15June 1 – 15
WaupunMay 15 – June 15June 1 – 15
WausauJune 1 – 15May 15 – June 1
WauwatosaMay 15 – June 15June 15 – July 20
West AllisMay 15 – June 15June 15 – July 20
West BendMay 15 – June 15June 1 – 15
WestonJune 1 – 15May 15 – June 1
Whitefish BayMay 15 – June 15June 15 – July 20
WhitewaterMay 15 – June 15June 1 – 15
WindsorMay 15 – June 15June 1 – 15
Wisconsin RapidsJune 1 – 15May 15 – June 1

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for watermelon.