Average First Frost Dates for Colorado

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First Frost Dates were calculated using daily climate data from the period between 1991-2020.

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List of Average First Frost Dates for Locations in Colorado

LocationAverage First Frost Dates
ArvadaOct. 1 - Oct. 10
AuroraOct. 1 - Oct. 10
Black ForestSep. 21 - Sep. 30
BoulderOct. 1 - Oct. 10
BrightonOct. 1 - Oct. 10
BroomfieldOct. 1 - Oct. 10
Castle RockSep. 21 - Sep. 30
CentennialOct. 1 - Oct. 10
Cimarron HillsOct. 1 - Oct. 10
CliftonOct. 11 - Oct. 20
Colorado SpringsOct. 1 - Oct. 10
ColumbineOct. 1 - Oct. 10
Commerce CityOct. 1 - Oct. 10
DenverOct. 1 - Oct. 10
DurangoSep. 21 - Sep. 30
EnglewoodOct. 1 - Oct. 10
ErieOct. 1 - Oct. 10
EvansOct. 1 - Oct. 10
FirestoneOct. 1 - Oct. 10
Fort CarsonOct. 1 - Oct. 10
Fort CollinsOct. 1 - Oct. 10
FountainOct. 1 - Oct. 10
FruitvaleOct. 11 - Oct. 20
GoldenSep. 21 - Sep. 30
Grand JunctionOct. 11 - Oct. 20
GreeleyOct. 1 - Oct. 10
Greenwood VillageOct. 1 - Oct. 10
Highlands RanchOct. 1 - Oct. 10
JohnstownOct. 1 - Oct. 10
Ken CarylOct. 1 - Oct. 10
LafayetteOct. 1 - Oct. 10
LakewoodOct. 1 - Oct. 10
LittletonOct. 1 - Oct. 10
LongmontOct. 1 - Oct. 10
LouisvilleOct. 1 - Oct. 10
LovelandOct. 1 - Oct. 10
MontroseOct. 1 - Oct. 10
NorthglennOct. 1 - Oct. 10
ParkerOct. 1 - Oct. 10
PuebloOct. 1 - Oct. 10
Pueblo WestOct. 1 - Oct. 10
SherrelwoodOct. 1 - Oct. 10
ThorntonOct. 1 - Oct. 10
TimnathOct. 1 - Oct. 10
WelbyOct. 1 - Oct. 10
WestminsterOct. 1 - Oct. 10
Wheat RidgeOct. 1 - Oct. 10
WindsorOct. 1 - Oct. 10

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