Frost dates in Colorado

Average last frost dates in Colorado run from April 14 in Grand Junction to June 9 in Steamboat Springs.

Average frost dates for 53 places in Colorado
PlaceLast frostFirst frost
ArvadaMay 5Oct 5
AuroraMay 7Oct 8
BerthoudMay 7Oct 5
BoulderMay 6Oct 5
BrightonMay 3Oct 7
BroomfieldMay 2Oct 11
Cañon CityMay 4Oct 7
Castle PinesMay 9Oct 2
Castle RockMay 9Oct 2
CentennialMay 5Oct 8
Colorado SpringsMay 3Oct 8
Commerce CityMay 3Oct 7
DenverMay 4Oct 8
DurangoMay 21Oct 2
EnglewoodMay 2Oct 11
ErieMay 7Oct 5
EvansMay 2Oct 8
Federal HeightsMay 2Oct 11
FirestoneMay 7Oct 5
Fort CollinsMay 2Oct 7
Fort MorganMay 6Oct 6
FountainMay 3Oct 8
FrederickMay 7Oct 5
FruitaApr 27Oct 11
Glenwood SpringsMay 13Oct 3
GoldenMay 3Oct 7
Grand JunctionApr 14Oct 23
GreeleyMay 2Oct 8
Greenwood VillageMay 7Oct 8
JohnstownMay 10Oct 1
LafayetteMay 2Oct 11
LakewoodMay 3Oct 7
LittletonMay 2Oct 11
Lone TreeMay 5Oct 8
LongmontMay 7Oct 5
LouisvilleMay 6Oct 5
LovelandMay 10Oct 1
MontroseApr 28Oct 14
MonumentMay 17Oct 1
NorthglennMay 2Oct 11
ParkerMay 9Oct 3
PuebloApr 30Oct 9
RifleMay 11Oct 4
SeveranceMay 3Oct 6
Steamboat SpringsJune 9Sept 12
SterlingApr 30Oct 9
SuperiorMay 6Oct 5
ThorntonMay 2Oct 11
TimnathMay 3Oct 6
WellingtonMay 3Oct 6
WestminsterMay 2Oct 11
Wheat RidgeMay 5Oct 5
WindsorMay 3Oct 6

Source: NOAA U.S. Climate Normals 1991–2020, nearest station to each place. Places of 10,000+ people (US Census Bureau, 2024 estimates) within 50 miles of a station.

When to plant in Colorado