Sprinkler Winterization in Maryland

In Maryland, local sprinklers deadlines run from Oct 22 to Nov 25, with a median around Nov 9 — 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.

Lawn sprinkler spraying water in low sunlight — blow out irrigation lines before the first hard freeze — Maryland deadlines city by city — Photo: Pexels

Jump to a city

Notable cities

Bowie — earliest deadline in the state
Baltimore — latest deadline in the state
Rockville — near the state median

All Maryland cities

City	Local deadline	Median first 28°F
Bowie	Oct 22	Nov 1	View →	Checklist
Hagerstown	Oct 30	Nov 9	View →	Checklist
Gaithersburg	Nov 9	Nov 19	View →	Checklist
Rockville	Nov 9	Nov 19	View →	Checklist
Frederick	Nov 11	Nov 21	View →	Checklist
Annapolis	Nov 18	Nov 28	View →	Checklist
Baltimore	Nov 25	Dec 5	View →	Checklist

Local sprinkler winterization deadlines for Maryland cities — built from each city’s own NOAA station, not one statewide date.

Sprinkler Winterization in Maryland: related searches

Maryland homeowners search for: sprinkler blowout cost, irrigation winterization, and "sprinkler winterization near me" — every city page below answers those with local NOAA dates.

sprinkler blowout costirrigation winterizationsprinkler blowout near meblow out sprinklers with air compressorCFM for sprinkler blowoutbackflow preventer freeze protectiondrain sprinkler system for wintermanual drain vs blowout

Back to the national Sprinkler Winterization guide, or see the methodology. You can also compare how the sprinkler winterization window shifts in Maine and Massachusetts.

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