Frost dates

Frost dates in North Dakota


Typical last spring frost and first fall frost for 125 weather stations across North Dakota, from NOAA’s 1991–2020 climate normals.

Last spring frost

May 8 – May 20

Typical across North Dakota (middle: May 13)

First fall frost

Sep 21 – Oct 1

Typical across North Dakota (middle: Sep 27)

Your own yard can differ by weeks from the nearest town. Get frost dates for your exact spot →

By town

StationLast spring frostFirst fall frostFrost-free days
AlmontMay 17Sep 21127
AmidonMay 12Sep 29140
AshleyMay 13Sep 28138
BeachMay 16Sep 26133
Belcourt Keya RadioMay 19Sep 24128
Beulah 1 WMay 21Sep 20122
BismarckMay 14Sep 27136
BismarckMay 14Sep 30139
Bismarck 2.4 NNWMay 10Sep 30143
BottineauMay 15Sep 25133
BowmanMay 16Sep 25132
BreienMay 12Sep 24135
Butte 5 SEMay 16Sep 28135
CarringtonMay 10Sep 28141
Carrington 4 NMay 12Sep 27138
CarsonMay 19Sep 25129
Casselton Agronomy FarmMay 9Oct 1145
Cavalier 7 NWMay 12Sep 30141
Center 4 SEMay 11Sep 29141
ColgateMay 10Sep 24137
CooperstownMay 17Sep 23129
CrosbyMay 17Sep 23129
Devils LakeMay 12Sep 30141
Devils Lake KdlrMay 6Oct 5152
DickinsonMay 20Sep 22125
Dickinson Rch HQMay 18Sep 24129
Drake 9 NEMay 12Sep 27138
Dunn Ctr 1 EMay 20Sep 21124
Edgeley 3 WNWMay 7Oct 2148
Edmore 4 NWMay 15Sep 22130
Edmunds Arrowwood RefMay 11Sep 28140
EllendaleMay 4Oct 2151
Enderlin 2 WMay 3Oct 5155
Esmond 9 NNWMay 11Sep 28140
FairfieldMay 12Sep 28139
Fargo 3 SMay 4Oct 2151
Fargo Hector International AirportMay 10Sep 30143
FessendenMay 13Sep 28138
FlasherMay 13Sep 27137
Forman 5 SSEMay 7Oct 1147
Fortuna 1 WMay 19Sep 17121
Foxholm 7 NMay 11Sep 29141
Fullerton 1 ESEMay 9Sep 28142
GackleMay 6Oct 4151
GarrisonMay 12Sep 30141
GarrisonMay 14Sep 26135
GraftonMay 4Oct 7156
Grand Forks International AirportMay 16Sep 27134
Grand Forks Univ (Nws)May 10Oct 1144
GranvilleMay 9Oct 1145
Grassy Butte 2 ENEMay 18Sep 23128
Hansboro 4 NNEMay 18Sep 23128
Harvey 4 NEMay 12Sep 26137
Hazelton 4 NWMay 12Sep 27138
Heart Butte DamMay 14Sep 29138
HebronMay 19Sep 21125
Hettinger Experiment StationMay 21Sep 21123
Hettinger Municipal AirportMay 24Sep 18117
Hillsboro 3 NMay 2Oct 9160
Jamestown 38 WSWMay 14Sep 27136
Jamestown Municipal AirportMay 11Sep 28140
Jamestown State HospMay 8Sep 29144
Keene 3 SMay 20Sep 20123
Kenmare 1 WSWMay 15Sep 23131
KilldeerMay 21Sep 23125
La MoureMay 10Sep 28141
Lake Metigoshe SpMay 17Sep 24130
Langdon Experiment FarmMay 17Sep 26132
Larimore 4 SWMay 11Sep 28140
LeedsMay 15Sep 27135
LidgerwoodMay 2Oct 6157
LintonMay 12Sep 29140
LisbonMay 12Sep 27138
Mandan Experiment StationMay 13Sep 27137
MaxMay 10Sep 28141
MayvilleMay 13Sep 27137
Mc CluskyMay 8Oct 1146
Mc Henry 3 WMay 12Sep 28139
Mc Leod 3 EMay 6Sep 29146
MedoraMay 19Sep 20124
Medora 7 EMay 9Sep 30144
MinnewaukanMay 12Sep 29140
Minot Experiment StationMay 13Sep 27137
Minot International AirportMay 10Oct 1144
Moffit 3 SEMay 11Sep 29141
MohallMay 17Sep 23129
MottMay 16Sep 25132
NapoleonMay 13Sep 28138
New EnglandMay 16Sep 24131
New Salem 5 NWMay 18Sep 24129
Northgate 5 ESEMay 20Sep 19122
OakesMay 8Sep 28143
PembinaMay 16Sep 29136
Petersburg 2 NMay 11Sep 28140
Powers Lake 1 NMay 18Sep 17122
Pretty RockMay 20Sep 23126
Richardton AbbeyMay 9Oct 1145
RiverdaleMay 12Oct 3144
Rolette 3 SEMay 22Sep 20121
Rolla 1 NEMay 20Sep 26129
RugbyMay 17Sep 23129
Stanley 3 NNWMay 17Sep 23129
Steele 4 NMay 15Sep 25133
Streeter 5 NWMay 13Sep 30140
Taylor 7 NNWMay 23Sep 20120
Theodore Roosevelt AirportMay 18Sep 25130
Tioga 1 EMay 11Sep 26138
Towner 2 NEMay 17Sep 22128
Trotters 3 SSEMay 15Sep 25133
Turtle LakeMay 14Sep 26135
Tuttle 12 NNEMay 13Sep 29139
UnderwoodMay 10Sep 29142
Upham 3 NMay 15Sep 25133
Valley City 3 NNWMay 13Sep 26136
VelvaMay 22Sep 22123
WashburnMay 12Sep 30141
Watford CityMay 9Sep 27141
Watford City 14 SMay 22Sep 17118
WesthopeMay 14Sep 25134
Wildrose 3 NWMay 18Sep 20125
Williston Experiment FarmMay 13Sep 26136
Williston Sloulin International AirportMay 21Sep 21123
Willow CityMay 21Sep 20122
WiltonMay 11Sep 30142
WishekMay 13Sep 27137

Each date is the median: in half of years the frost comes earlier, in half later. Frost here means a low of 32°F or colder at the station. Low spots and valleys often frost a week or two earlier than these dates; hillsides and city centers later.

Source: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020. The Field almanac also shows how often frost comes early or late, and a reanalysis reading for your exact location.

Frost dates for every state