FrostList

Sump Pump Test in Colorado

In Colorado, local sump pump deadlines run from Apr 14 to May 10, with a median around May 3 — 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.

Meltwater and rain streaming off a roof edge — spring thaw is when a working sump pump earns its keep — Colorado deadlines city by city
Photo: Kenneth Adams / Unsplash

Notable cities

All Colorado cities

CityLocal deadlineMedian first 28°F
Grand JunctionApr 14Nov 2View →Checklist
DenverApr 30Oct 21View →Checklist
PuebloApr 30Oct 18View →Checklist
Fort CollinsMay 2Oct 17View →Checklist
ThorntonMay 2Oct 21View →Checklist
WestminsterMay 2Oct 21View →Checklist
GreeleyMay 2Oct 18View →Checklist
BroomfieldMay 2Oct 21View →Checklist
LittletonMay 2Oct 21View →Checklist
NorthglennMay 2Oct 21View →Checklist
Colorado SpringsMay 3Oct 16View →Checklist
LakewoodMay 3Oct 16View →Checklist
AuroraMay 4Oct 18View →Checklist
Commerce CityMay 4Oct 18View →Checklist
ArvadaMay 5Oct 14View →Checklist
CentennialMay 5Oct 17View →Checklist
BoulderMay 6Oct 15View →Checklist
LongmontMay 7Oct 12View →Checklist
Castle RockMay 9Oct 12View →Checklist
ParkerMay 9Oct 12View →Checklist
LovelandMay 10Oct 10View →Checklist
MayJunGrand JunctionApr 14DenverApr 30PuebloApr 30Fort CollinsMay 2ThorntonMay 2WestminsterMay 2GreeleyMay 2BroomfieldMay 2LittletonMay 2NorthglennMay 2Colorado SpringsMay 3LakewoodMay 3AuroraMay 4Commerce CityMay 4ArvadaMay 5CentennialMay 5BoulderMay 6LongmontMay 7

Local sump pump test deadlines for Colorado cities — built from each city’s own NOAA station, not one statewide date.

Sump Pump Test in Colorado: related searches

Colorado homeowners search for: how to test a sump pump, sump pump lifespan, and "sump pump test near me" — every city page below answers those with local NOAA dates.

how to test a sump pumpsump pump lifespansump pump replacement costsump pump battery backupfloat switch stucksump pump check valvefrozen discharge linebasement flooding spring thaw

Back to the national Sump Pump Test guide, or see the methodology. You can also compare how the sump pump test 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.