FrostList

Ice Dam Prevention in Colorado

In Colorado, local ice dams deadlines run from Aug 16 to Oct 16, with a median around Sep 15 — a spread of weeks that a single statewide date would miss. Find your city below; each links to local freeze odds, a live 10-day outlook, and a checklist.

Icicles forming along a snowy roof edge — an early warning sign of ice dams backing water under the shingles — Colorado deadlines city by city
Photo: Valeria Boltneva / Pexels

Notable cities

All Colorado cities

CityLocal deadlineMedian first 28°F
ArvadaAug 16Oct 14View →Checklist
BoulderAug 16Oct 15View →Checklist
DenverSep 15Oct 21View →Checklist
Colorado SpringsSep 15Oct 16View →Checklist
AuroraSep 15Oct 18View →Checklist
Fort CollinsSep 15Oct 17View →Checklist
LakewoodSep 15Oct 16View →Checklist
ThorntonSep 15Oct 21View →Checklist
WestminsterSep 15Oct 21View →Checklist
PuebloSep 15Oct 18View →Checklist
CentennialSep 15Oct 17View →Checklist
GreeleySep 15Oct 18View →Checklist
LovelandSep 15Oct 10View →Checklist
BroomfieldSep 15Oct 21View →Checklist
Castle RockSep 15Oct 12View →Checklist
Commerce CitySep 15Oct 18View →Checklist
ParkerSep 15Oct 12View →Checklist
LittletonSep 15Oct 21View →Checklist
NorthglennSep 15Oct 21View →Checklist
Grand JunctionOct 16Nov 2View →Checklist
SepOctArvadaAug 16BoulderAug 16DenverSep 15Colorado SpringsSep 15AuroraSep 15Fort CollinsSep 15LakewoodSep 15ThorntonSep 15WestminsterSep 15PuebloSep 15CentennialSep 15GreeleySep 15LovelandSep 15BroomfieldSep 15Castle RockSep 15Commerce CitySep 15ParkerSep 15LittletonSep 15

Local ice dam prevention deadlines for Colorado cities — built from each city’s own NOAA station, not one statewide date.

Ice Dam Prevention in Colorado: related searches

Colorado homeowners search for: ice dam removal cost, ice dam steaming, and "ice dam prevention near me" — every city page below answers those with local NOAA dates.

ice dam removal costice dam steamingroof rake for snow removalattic air sealingattic insulation R-valueheat cable for roofcalcium chloride sock ice damice and water shield

Back to the national Ice Dam Prevention guide, or see the methodology. You can also compare how the ice dam prevention window shifts in California and Connecticut.

Data: NOAA NCEI 1991–2020 U.S. Climate Normals; live outlook by Open-Meteo. Last updated: July 25, 2026.