Indoor Thermometers & Hygrometers

An indoor hygrometer is a small device that measures both the temperature and the humidity of a room, so you know not just how warm it is but how moist or dry the air is. Humidity matters more than most people realize: air that's too dry cracks skin, wood instruments, and furniture, while air that's too damp invites mold, dust mites, and musty smells. If you have a baby's room, houseplants, a guitar, a wine collection, a greenhouse, or you just want a healthier, more comfortable home, a hygrometer tells you exactly when to run a humidifier or dehumidifier.

Pick by your space and how you want to check it:

• One for every room (Best Seller!): TP49 — temp, humidity, and comfort indicator, in 2/3/4-packs to cover the home cheaply.
• From anywhere (Wi-Fi + Alexa): TP90 connects to Wi-Fi for remote monitoring and Alexa.
• High/low tracking: TP50 records daily highs and lows.
• Read across the room: TP55 has a large 4-inch touchscreen.
• Fridge/freezer: TP110 is IPX6 waterproof, -4°F to 122°F, 24-hour records.

Our standalone hygrometers read temperature to about ±1°F and humidity to within ±2-3% RH, tight enough for the decisions that matter: whether to run a humidifier, whether your greenhouse is in range, whether your humidor is holding. Humidity accuracy is the spec that separates a useful hygrometer from a decorative one.

The standalone models refresh every 10 seconds, so you see changes as they happen instead of waiting on a slow readout, which matters in fast-shifting spaces like greenhouses or grow tents. The TP50 records daily high and low readings, the TP110 keeps 24-hour highs and lows for your fridge or freezer, so you can tell if conditions swung out of range while you weren't watching.

It's an at-a-glance icon that reads Dry, Comfortable, or Wet, so you don't have to memorize what humidity percentage is ideal. See "Dry" and you know to run a humidifier, see "Wet" and it's time to dehumidify or open a window. It turns a raw number into a clear action, which is why it's the feature most people end up relying on day to day.

Yes! To all of them! and that versatility is a big part of the appeal. The same device that tracks your living room also works as a greenhouse monitor, humidor hygrometer, reptile-tank gauge, or wine-cellar tracker. For cold storage specifically, the TP110 is built for refrigerators, freezers, and coolers with IPX6 waterproofing and a -4°F to 122°F range, where a standard room unit would struggle. One lineup covers your whole home, your hobbies, and your appliances.

The standalone models include three placement options: a fold-out tabletop stand, a magnetic back for the fridge or any metal surface, and a wall or hanging mount, so they fit anywhere from a nursery shelf to a greenhouse post. Because each unit reads only its own room, the simplest way to cover a whole home is a multi-pack, and the best-selling TP49 comes in 2, 3, and 4-packs so you can watch the bedroom, nursery, and basement all at once without spending much.

Yes! Many TempPro instant-reads, including the TP622 Lightning, feature custom calibration, so if readings ever drift you can reset them yourself and keep the accuracy for years. A quick way to check any thermometer is the ice-water test: a well-calibrated probe should read 32°F in a glass of ice water. That self-check plus calibration is why a quality instant-read outlasts the cheap ones you'd otherwise keep replacing.

Absolutely Not. The premium brands built their reputation on 1-second reads and ±0.5°F accuracy, and the TP622 Lightning delivers exactly that for roughly half the price, with a 10-year warranty on top. It's earned a "Best Value" award from AmazingRibs and praise from Food & Wine and Smoked BBQ Source. You're paying for the performance, not the logo.

TempPro (formerly ThermoPro) has been a trusted name in cooking thermometers for years, with millions sold. Every instant-read is NSF-certified for food safety, self-calibratable for lasting accuracy, and backed by a hassle-free warranty, up to 10 years on the Lightning. Order direct and you also get a 30-day money-back guarantee, free shipping over $30, and lifetime customer support, plus bundle deals you won't