Wine Cellar Monitoring: Temperature, Humidity & Drift Alerts (2026)

Store wine at about 55°F (13°C) and 60–70% relative humidity, kept stable, dark, and free of vibration. The single most important word there is stable: wine is far more forgiving of being held a few degrees off the textbook number than of being swung up and down. A cellar's real job — and the real risk — is catching the slow drift or the silent cooling-unit failure before it cooks a collection. Below are the targets and how to monitor them so a failure pages you instead of surprising you.

Wine cellar targets

• Temperature: ~55°F (12–13°C) is the classic long-term aging number. A wider 45–65°F (7–18°C) is tolerable for storage, but the aging sweet spot is near 55°F. What matters most is avoiding swings and heat spikes — repeated thermal cycling ages wine prematurely and can push corks.
• Humidity: 60–70% RH. Enough to keep corks from drying and shrinking (which lets air in and oxidizes the wine); not so high that labels mold and peel. Below ~50% RH for long periods risks cork failure.
• Light: dark. UV degrades wine — especially in clear and green glass — so a cellar stays dark or uses UV-free light.
• Vibration: minimal. Constant vibration is widely held to disturb sediment and aging; keep compressors and foot traffic isolated.

Why stability beats the perfect number

A cellar sitting rock-steady at 58°F will age a collection better than one that averages a perfect 55°F but swings between 48°F and 64°F every day. Each warm-cool cycle expands and contracts the wine and the air in the bottle's headspace, working the cork and accelerating oxidation. So when you monitor a cellar, you care about two things the average hides: the range (how far it swings) and the events (the afternoon the cooling unit quit). A daily min/max and an alert on excursion catch both.

The failure that actually costs you

The expensive wine-cellar event isn't a slightly-wrong setpoint — it's a cooling unit that fails and nobody notices for days. A cellar packed with valuable bottles can climb into the 70s°F over a weekend after a compressor or a split-system failure, and the damage is done quietly. This is the entire case for continuous monitoring with remote alerting: you want a message the hour the temperature starts climbing, not a discovery when you next open the door.

Monitoring a cellar properly

Good cellar monitoring comes down to:

• Continuous temperature + humidity sensing with a trend history, so you see range and drift, not just the current number.
• Threshold alerts on high/low temp and humidity, delivered remotely — the point is to hear about a failure while you're not there.
• A logged history for insurance and provenance, and to prove a collection was stored correctly.
• Optionally door and power monitoring, since an open door or a tripped breaker is often the root cause.

LoopString's automation platform does this on a Raspberry Pi: a temperature/humidity sensor reads the cellar continuously, the dashboard shows trend and min/max so drift is visible, and threshold alerts reach you remotely the moment the cellar leaves its band — with every reading logged. For an active cooling cellar it can also drive the cooling and a humidifier to hold the setpoint, the same way it holds a cheese cave or a curing chamber. The goal is simple: never lose a collection to a failure you could have been told about.

Quick reference

1. Target ~55°F (13°C) and 60–70% RH — and prize stability over hitting the number exactly.
2. Keep it dark and low-vibration.
3. Monitor range (min/max), not just the current reading.
4. Put a remote alert on temperature excursion — the real risk is an unnoticed cooling failure.
5. Log the history for insurance, provenance, and peace of mind.