“Detroit frozen pipes” is a search that spikes every cold snap. This guide uses NOAA weather records and National Weather Service advice to explain when Detroit pipes freeze, which ones go first, and what to do. If a pipe has already split, shut off the main and call (313) 474-7729.
How cold Detroit gets
NOAA daily observations at Detroit Metro Airport (DTW), 2015-2025, show:
| Measure (10 winters) | Value |
|---|---|
| Average nights at or below 32°F per winter | 111 |
| Average days that never got above 32°F | 30 |
| Average days with a low of 0°F or colder | 2.6 |
| Winters with at least one 0°F-or-colder low | 9 of 10 |
| Coldest low recorded | -14.0°F (winter 2018–19) |
| Average January low | 21°F |
Pipes rarely freeze on an ordinary freezing night. The risk comes with multi-day stretches where the high stays below freezing, especially with wind, and with sub-zero nights.
Which pipes freeze first in older Detroit homes
- Supply lines on exterior walls, especially kitchen sinks on outside walls.
- Pipes near basement windows, rim joists and unsealed openings.
- Lines in crawlspaces under additions or enclosed porches.
- Outdoor hose bibs that weren't shut off and drained.
- Any plumbing in a vacant or barely heated house.
Prevention (NWS guidance)
- Insulate exposed pipes in unheated areas and seal cold-air gaps near them.
- Open cabinet doors under sinks on exterior walls during severe cold.
- Let a faucet drip slowly on the coldest nights.
- If you're away, keep the heat on (NWS suggests at least 55°F).
- Drain and shut off outdoor faucets and hoses in fall.
- Know where your main shutoff is.
If a pipe freezes
Open the faucet it feeds, then warm the pipe with a hair dryer, heating pad or warm towels, starting near the faucet. Never use an open flame. If you can't find the frozen section, can't reach it, or it's split, call a plumber. Our emergency plumber page covers burst pipes.
Frequently asked questions
At what temperature do pipes freeze in Detroit?
Pipes in unheated spaces are at risk once temperatures stay below freezing for an extended time, and especially on sub-zero nights. NOAA records show DTW averages 30 days a winter that never rise above 32°F.
Should I let faucets drip in a Detroit cold snap?
The National Weather Service recommends letting faucets drip slowly during severe cold, especially on lines along exterior walls.
How do I thaw a frozen pipe safely?
Open the faucet, then use gentle heat like a hair dryer or warm towels. Never use an open flame.
What temperature should I keep the house when I'm away?
NWS suggests at least 55°F.