Frost dates

Frost dates in Colorado


Typical last spring frost and first fall frost for 210 weather stations across Colorado, from NOAA’s 1991–2020 climate normals.

Last spring frost

Apr 30 – Jun 9

Typical across Colorado (middle: May 11)

First fall frost

Sep 14 – Oct 14

Typical across Colorado (middle: Oct 4)

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
Akron 4 EMay 8Oct 6151
Akron Washington County AirportMay 6Oct 8155
Alamosa 1 EMay 30Sep 17110
Alamosa San Luis AirportJun 7Sep 15100
Allenspark 3 NWJun 14Sep 1290
AltenbernMay 25Sep 25123
Arapahoe 12 SMay 5Oct 9157
Arapahoe 14 NMay 9Oct 7151
Aspen 1 SWJun 2Sep 23113
Aspen Pitkin County AirportMay 31Sep 23115
BaileyJun 16Sep 884
Black Canyon Of The GunnisonMay 23Oct 1131
Black Forest 6 WNWMay 11Oct 6148
Blanca 4 NWMay 25Sep 22120
Blue Mesa LakeJun 9Sep 1699
Bonny Dam 2 NEMay 5Oct 10158
BoulderMay 6Oct 5152
Boulder 14 WJun 21Sep 273
BriggsdaleMay 12Sep 28139
Brighton 3 SEMay 3Oct 7157
Buckhorn Mountain 1 EMay 21Sep 29131
Buena Vista 2 SMay 27Sep 23119
BurlingtonMay 6Oct 9156
Burlington Carson AirportMay 2Oct 10161
Byers 5 ENEMay 13Oct 2142
Cabin CreekJun 6Sep 19105
Campo 7 SApr 29Oct 13167
Canon CityMay 4Oct 7156
Castle RockMay 9Oct 2146
Cedaredge 3 EMay 3Oct 9159
Center 4 SSWMay 24Sep 24123
CheesmanMay 17Oct 1137
Cheraw 1 NApr 30Oct 10163
Cherry Creek DamMay 7Oct 8154
Cheyenne Wells 2 NEMay 1Oct 14166
CimarronJun 20Sep 1082
Coal Creek CanyonJun 5Sep 16103
Cochetopa CreekJun 21Sep 576
Collbran 1 WSWMay 17Sep 30136
Colorado NmApr 26Oct 16173
Colorado Springs Municipal AirportMay 3Oct 8158
CortezMay 12Oct 7148
Cortez 8 SEMay 6Oct 14161
Cortez Montezuma County AirportMay 27Sep 28124
Craig 4 SWMay 29Sep 20114
Craig Moffat County AirportJun 6Sep 1298
Crestone 2 SEMay 26Sep 26123
Cripple Creek 3 NNWMay 26Sep 26123
CrookMay 11Oct 4146
Cumbre Vista - Colorado Springs 1May 9Oct 6150
Del Norte 3 ENEMay 23Sep 25125
Delta 3 EMay 1Oct 7159
Denver Centennial AirportMay 5Oct 8156
Denver International AirportMay 5Oct 9157
Denver Water DeptApr 30Oct 12165
Denver-StapletonMay 4Oct 8157
Dinosaur 2 EMay 2Oct 14165
Dinosaur NmMay 12Oct 5146
Divide 4 NWJun 1Sep 21112
Dove CreekMay 11Oct 12154
DurangoMay 21Oct 2134
Durango La Plata County AirportJun 1Sep 27118
EadsApr 30Oct 13166
Eastonville 2 NNWMay 29Sep 21115
Elizabeth 2 NWMay 16Oct 2139
Ellicott 7 SMay 6Oct 3150
Estes Park 3 SSEMay 30Sep 17110
EvergreenMay 23Sep 22122
Fairplay S Park RdJun 16Sep 985
Flagler 1 SMay 5Oct 8156
Fleming 3 SWMay 4Oct 11160
Fort CollinsMay 2Oct 7158
Fort Collins 4 EMay 3Oct 6156
Fort LewisJun 1Sep 27118
Fort MorganMay 6Oct 6153
FruitaApr 27Oct 11167
Gateway 1 ENEApr 20Oct 21184
GenoaMay 8Oct 10155
GeorgetownMay 30Sep 19112
Glade Park 17 WMay 21Sep 26128
Glenwood Springs #2May 13Oct 3143
Grand JunctionApr 14Oct 23192
Grand Junction 6 ESEApr 23Oct 20180
Grand Junction Walker FieldApr 28Oct 16171
Grand Lake 6 SSWJun 13Sep 786
GrantJun 15Sep 986
Great Sand Dunes Np & PreserveMay 21Oct 1133
Greeley UncMay 2Oct 8159
Green Mount DamJun 6Sep 14100
Gross ReservoirMay 24Sep 23122
Guffey 9 SEMay 19Oct 2136
HaydenJun 1Sep 20111
HollyMay 1Oct 12164
HolyokeMay 11Oct 3145
Hugo 1 NWMay 10Oct 2145
IdaliaMay 4Oct 9158
Ignacio 6 ESEMay 23Sep 29129
JoesMay 3Oct 9159
John Martin DamApr 24Oct 15174
JulesburgMay 7Oct 6152
KarvalMay 9Oct 6150
KasslerMay 8Oct 3148
Kim 10 SSEApr 24Oct 18177
Kim 15 NNEMay 5Oct 9157
Kit CarsonMay 10Oct 1144
Kit Carson 9 NNEMay 7Oct 6152
KremmlingJun 14Sep 583
La JuntaApr 26Oct 15172
La Junta 17 WSWMay 8Oct 4149
La Junta 20 SApr 27Oct 14170
La Junta Municipal AirportApr 24Oct 15174
Lake CityJun 8Sep 17101
Lake City 1 NNEJun 9Sep 17100
Lake George 8 SWJun 2Sep 19109
LakewoodMay 3Oct 7157
LamarApr 30Oct 10163
Lamar Municipal AirportMay 2Oct 7158
Las AnimasApr 29Oct 12166
Lemon DamMay 28Sep 30125
Leroy 5 WSWMay 10Oct 6149
LimonMay 21Sep 26128
Lindon 5 WNWMay 15Oct 2140
Longmont 2 ESEMay 7Oct 5151
Loveland 2 NMay 10Oct 1144
ManassaMay 28Sep 21116
Mancos 1 SWJun 4Sep 24112
Marston Fltr PltMay 2Oct 11162
Massadona 3 EMay 10Oct 4147
Matheson 8 SEMay 12Oct 2143
MaybellJun 16Sep 985
MeekerJun 4Sep 16104
Meeker AirportMay 30Sep 22115
Mesa Verde NpMay 9Oct 14158
Monte Vista 2 WJun 11Sep 1394
Montrose #2Apr 28Oct 14169
Montrose 11 ENEMay 20Oct 1134
Montrose Regional AirportMay 2Oct 8159
MonumentMay 14Oct 1140
Monument 3 SMay 17Oct 1137
New RaymerMay 9Oct 4148
New Raymer 21 NMay 18Sep 29134
NorthdaleJun 3Sep 25114
NorthglennMay 2Oct 11162
NorwoodMay 25Oct 1129
Norwood #2May 21Oct 1133
Nunn 7 NNEMay 13Sep 27137
Ordway 1 ENEMay 2Oct 8159
Ordway 21 NMay 3Oct 7157
OurayMay 17Oct 1137
Ouray #2May 18Oct 4139
PalisadeApr 17Oct 26192
Paonia 1 SWMay 3Oct 12162
Paradox 2 NMay 11Oct 5147
ParkerMay 9Oct 3147
PlacervilleMay 26Sep 29126
PuebloApr 30Oct 9162
Pueblo Mem AirportApr 30Oct 9162
Pueblo ReservoirApr 26Oct 13170
Ralston ReservoirMay 3Oct 14164
Rangely 1 EMay 15Oct 1139
RidgwayJun 11Sep 1394
Rifle 3 ENEMay 23Sep 25125
Rifle Garfield County AirportMay 11Oct 4146
Rio Grande ReservoirJun 15Sep 1188
Rocky Ford 2 SEMay 1Oct 8160
Roxborough SpMay 16Oct 1138
Rush 1 NMay 9Oct 4148
Rustic 9 WSWJun 5Sep 16103
Ruxton ParkJun 3Sep 17106
Rye 1 SWMay 5Oct 10158
SaguacheMay 16Sep 28135
SalidaMay 29Sep 20114
San Luis 1 SMay 31Sep 23115
Sedgwick 5 SMay 6Oct 7154
SeibertMay 4Oct 11160
Shaw 4 ENEMay 12Oct 4145
Sheep MountainMay 27Sep 25121
Sheridan LakeApr 27Oct 15171
Sheridan Lake 4 EApr 28Oct 13168
ShoshoneMay 1Oct 14166
Springfield ComancheMay 3Oct 10160
Steamboat SpringsJun 9Sep 1295
SterlingApr 30Oct 9162
StrattonMay 6Oct 9156
Strontia Springs DamMay 16Sep 29136
Tacony 13 SEMay 5Oct 6154
Taylor ParkJun 20Sep 880
TrinidadApr 30Oct 15168
Trinidad LakeMay 11Oct 4146
Trinidad Perry Stokes AirportMay 4Oct 9158
Twin Lakes ReservoirJun 16Sep 1086
UravanApr 26Oct 18175
VailJun 21Sep 778
Vallecito DamMay 31Sep 26118
Vallecito ReservoirMay 18Oct 11146
Virginia Dale 7 ENEMay 31Sep 19111
Walsenburg 1 NWMay 6Oct 4151
Walsh 1 WApr 30Oct 14167
WaterdaleMay 12Oct 1142
Waverly 1 WJun 6Sep 15101
WestcliffeJun 11Sep 990
Wheat Ridge 2May 5Oct 5153
Wild Horse 6 NMay 4Oct 8157
Williams Fork DamJun 12Sep 1090
Woodrow 6 NNEMay 15Oct 1139
WrayMay 7Oct 6152
YampaJun 14Sep 1189
Yellow Jacket 2 WMay 17Oct 9145
Yellow Jacket 4 NEMay 15Oct 8146
YumaMay 1Oct 12164

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