FrostList

When to Prevent Frozen Pipes in Morgan Hill, CA

ON TRACK139 days until first freezing night (32°F)Nov 27

Freezing nights in Morgan Hill begin around November 27 in a typical year, and as early as November 10 one fall in ten (1991–2020 NOAA normals); pipes come under real risk once lows reach the low 20s. The early-to-late range spans roughly 51 days, so treat the median as a midpoint, not a promise.

OUTLOOK

Typical first first freezing night (32°F) near Nov 27; local deadline about Nov 10. The live 10-day outlook loads here.

Local freeze dates for Morgan Hill

ThresholdEarly (1-in-10)MedianLate (9-in-10)
32°F (light freeze)Nov 10Nov 27Dec 18
28°F (hard freeze)Nov 24Dec 12Jan 14
24°F (severe)Dec 8Dec 27Jan 19

NOAA station: Gilroy · 10.2 mi away · 194 ft elevation.

The reference station for Morgan Hill is Gilroy (10.2 mi, 194 ft). First freeze there: 32°F by Nov 27, 28°F by Dec 12, 24°F by Dec 27. Year to year the 28°F date has ranged from Nov 24 to Jan 14 — about 51 days apart. Spring's last 32°F freeze clears around Feb 24.

Expect the first frost near Nov 27 in Morgan Hill and the first hard freeze by about Dec 12. The 32°F date swings from Nov 10 at its earliest to Dec 18 at its latest, near 38 days. The last spring freeze averages Feb 24 and as late as Apr 4, which sets the safe window for reopening outdoor water and de-winterizing gear. Snow barely registers here; the freeze date, around Feb 24, is the one that matters.

Your frozen pipes checklist

  1. Disconnect, drain, and store garden hoses, then shut off and drain any interior valves that feed outdoor faucets.
  2. Insulate exposed pipes in the garage, crawl space, and along exterior walls with foam sleeves rated for the pipe size.
    Helpful gear: Foam pipe insulation sleeves — Recommended pick
  3. On nights in the low 20s, let a pencil-thin stream of water drip from the faucet farthest from where the line enters.
  4. Open cabinet doors under kitchen and bathroom sinks on outside walls so household heat reaches the plumbing.
  5. Add self-regulating heat cable to the runs most likely to freeze, such as a pipe in an unheated garage.
    Helpful gear: Self-regulating heat cable — Recommended pick
  6. Cap outdoor faucets with insulated covers once the hoses are off.
    Helpful gear: Outdoor faucet covers — Recommended pick
  7. Know where your main shutoff is and confirm it turns; a fast shutoff limits water damage if a line lets go.
  8. If you travel, keep the thermostat at 55°F or higher and ask someone to check the house during a cold snap.
    Helpful gear: Wi-Fi water leak sensor — Recommended pick

What to have on hand

Foam pipe insulation sleeves
Split foam tubing for exposed pipes in crawl spaces and garages.
Recommended pick
Self-regulating heat cable
Thermostatic cable that warms vulnerable runs only when it is cold.
Recommended pick
Outdoor faucet covers
Insulated caps for hose bibs once the hoses come off.
Recommended pick
Wi-Fi water leak sensor
Puck that pings your phone the moment it senses water.
Recommended pick

What this means locally

Morgan Hill freezes close to Gilroy (Nov 27) and about a week ahead of Watsonville (Dec 13) — a reminder that even nearby towns differ by days. Statewide, California prep dates run Oct 17 through Dec 23, which is why Morgan Hill gets its own number rather than a California-wide average. The same freeze also decides when to shut down your sprinklers and check your car battery.

Other winter jobs in Morgan Hill

Every task below is dated to Morgan Hill's own freeze and snow normals.

Sprinklers → Dec 2Car battery → Dec 12Sump pump → Feb 24RV → Dec 2Boat → Dec 5Motorcycle → Nov 27

See the full Morgan Hill winter checklist, in order →

Frequently asked questions

At what temperature do pipes freeze?
Pipes generally come under risk when the temperature outside falls to about 20°F, the threshold many guides use for taking action. Pipes in unheated or exterior-wall spaces freeze sooner than well-insulated interior runs. Wind and poor insulation lower the effective temperature, so a windy night in the mid-20s can be as risky as a still night in the low 20s.
Should I drip my faucets tonight in Morgan Hill?
If the overnight low is forecast at or below about 20°F, letting a thin stream run from the faucet farthest along the line is a low-cost precaution. Moving water is slower to freeze and relieves pressure. Check tonight's low against the live outlook above; freezing nights here typically begin around Nov 27.
How long does it take for pipes to freeze?
There is no fixed clock; it depends on pipe location, insulation, and how far below freezing the air drops. An exposed pipe in a windy, unheated space can freeze in a matter of hours during a hard cold snap, while a protected interior pipe may never reach freezing. The colder and windier it is, the faster it happens.
Which pipes freeze first?
The most exposed pipes freeze first: outdoor hose bibs, and lines in unheated garages, crawl spaces, attics, and along exterior walls. Pipes under sinks on outside walls are common trouble spots. That is why disconnecting hoses and opening cabinet doors on cold nights are two of the highest-value steps.
Does homeowners insurance cover burst pipes?
Sudden, accidental water damage from a frozen pipe is often covered, but insurers may deny a claim if the home was left unheated or the damage is judged to be from neglect. Coverage varies by policy. Keeping the heat on and taking reasonable precautions helps protect both your home and your claim.
What temperature should I keep my house if I'm away?
A common recommendation is to keep the thermostat no lower than 55°F while you are away so interior walls stay warm enough to protect the plumbing. Leaving cabinet doors open and having someone check the house during a cold snap adds a margin of safety, especially for pipes on exterior walls.

Data: NOAA 1991–2020 normals via Gilroy, live outlook by Open-Meteo. Sources · Methodology. Last updated: July 11, 2026.