North Dakota Frost Dates

Across North Dakota, the average last spring frost ranges from May 4 in Fargo to May 21 in Williston. Find your town below, or enter your ZIP code for the nearest station.

Largest cities

FargoBismarckGrand ForksMinotWest FargoWillistonDickinson

Average frost dates in North Dakota towns

Average (50%) dates of the last 32°F frost in spring and the first in fall, from the nearest NOAA station. Towns with 5,000+ residents.

TownLast frostFirst frostSeason (days)
BismarckMay 10Sep 30142
Devils LakeMay 6Oct 5152
DickinsonMay 20Sep 22123
FargoMay 4Oct 2151
Grand ForksMay 10Oct 1144
HoraceMay 4Oct 2151
JamestownMay 8Sep 29143
MandanMay 13Sep 27136
MinotMay 10Oct 1144
Valley CityMay 13Sep 26136
WahpetonMay 4Oct 3152
Watford CityMay 9Sep 27139
West FargoMay 4Oct 2151
WillistonMay 21Sep 21123