Best Hygrometers and Thermo-Hygrometers for Home Humidity

For most homes, the TempPro TP49 is the hygrometer to get: a compact digital thermometer-hygrometer with a stated ±2% RH accuracy from 30% to 80%, a 10-second refresh, a comfort face icon, and tabletop, magnet or hanging placement on one AAA battery. If you want phone alerts and history, the TempPro TP358 adds Bluetooth 5.0 with a 260ft range, custom alerts and 2 years of stored data. For the tightest specification and real logging, the SensorPush HT1 records every minute with over two weeks of on-board storage and can go fully remote with its optional G1 WiFi gateway. If you just want a plain gauge on a shelf, the AcuRite 00325 shows current conditions, a comfort icon and daily highs and lows. Recommendations are based on makers' specifications and manuals, checked November 5, 2026; we have not physically tested these instruments.

• ±2% RHTP49 and TP358 stated accuracy from 30% to 80%
• 10 secondsRefresh rate of both TempPro display units
• 2 yearsHistory the TP358 app can store and export

Quick picks: match the meter to the room

Compare specifications and all conditions

One glance answer in any room

Our pick

TempPro TP49

What earns its place

±2% RH (30–80%), 10-second refresh, 3 mounting options

What to check before buying

No backlight, no app, no alerts; accuracy is ±3% outside 30–80%

Phone alerts and trend graphs

Our pick

TempPro TP358

What earns its place

Bluetooth 5.0, 260ft range, backlit LCD, 2-year exportable history

What to check before buying

Bluetooth range only, not remote over the Internet; 2 x AAA batteries

Humidor, greenhouse or monitoring while away

Our pick

SensorPush HT1

What earns its place

±3% typical accuracy, one-minute logging, over two weeks on board; optional G1 gateway

What to check before buying

No display of its own; remote monitoring and email alerts need the separate G1 gateway

Plain shelf gauge, no phone

Our pick

AcuRite 00325

What earns its place

Comfort icon, daily high/low records, band-by-band accuracy spec

What to check before buying

Humidity range starts at 16% RH; battery not included; no long-term history

Full comparison table ↔

Swipe to compare. Row labels stay visible.

Your situation	Our pick	What earns its place	What to check before buying
One glance answer in any room	TempPro TP49	±2% RH (30–80%), 10-second refresh, 3 mounting options	No backlight, no app, no alerts; accuracy is ±3% outside 30–80%
Phone alerts and trend graphs	TempPro TP358	Bluetooth 5.0, 260ft range, backlit LCD, 2-year exportable history	Bluetooth range only, not remote over the Internet; 2 x AAA batteries
Humidor, greenhouse or monitoring while away	SensorPush HT1	±3% typical accuracy, one-minute logging, over two weeks on board; optional G1 gateway	No display of its own; remote monitoring and email alerts need the separate G1 gateway
Plain shelf gauge, no phone	AcuRite 00325	Comfort icon, daily high/low records, band-by-band accuracy spec	Humidity range starts at 16% RH; battery not included; no long-term history

Your situation	Our pick	What earns its place	What to check before buying
One glance answer in any room	TempPro TP49	±2% RH (30–80%), 10-second refresh, 3 mounting options	No backlight, no app, no alerts; accuracy is ±3% outside 30–80%
Phone alerts and trend graphs	TempPro TP358	Bluetooth 5.0, 260ft range, backlit LCD, 2-year exportable history	Bluetooth range only, not remote over the Internet; 2 x AAA batteries
Humidor, greenhouse or monitoring while away	SensorPush HT1	±3% typical accuracy, one-minute logging, over two weeks on board; optional G1 gateway	No display of its own; remote monitoring and email alerts need the separate G1 gateway
Plain shelf gauge, no phone	AcuRite 00325	Comfort icon, daily high/low records, band-by-band accuracy spec	Humidity range starts at 16% RH; battery not included; no long-term history

Best for most homes: TempPro TP49

The TP49 is the answer for the most common job: know the temperature and humidity of a bedroom, office, kitchen or guitar room at a glance, cheaply and without a phone. What separates it from the flood of spec-free dials is that TempPro publishes the numbers. The product page states ±0.9°F (±0.5°C) temperature accuracy from 32 to 140°F, ±2% RH from 30% to 80% — the band almost every lived-in room sits in — an NTC sensor, and a 10-second refresh rate, so the display is not showing you this morning's air.

• Placement: tabletop stand, magnetic back or hanging mount, so it fits a shelf, a fridge door or a wall nail
• Power: one AAA battery at 1.5V
• Comfort indicator: a face icon flags dry, comfortable or wet conditions without reading numbers
• Multi-room: sold in 2- and 3-packs (the TP49B 2-Pack is listed on the same maker page) for covering a bedroom, nursery and office at once

The trade-offs: no backlight (the maker points night-owl readers to its TP53), no app, no alerts and no history — it is a display, not a monitoring system. Accuracy also widens to ±3% below 30% and above 80% RH, and to ±1.8°F outside the 32–140°F band. One packaging note: the brand was renamed, and the maker says your order may arrive in packaging with its previous brand name (ThermoPro) — same product either way.

Best for alerts and history: TempPro TP358

The TP358 is the pick when silence is the problem — a basement creeping past 60% RH or a nursery drying out overnight. Its page documents Bluetooth 5.0 with a 260ft (80m) transmission range, the same ±0.9°F / ±2% RH mid-band accuracy as the TP49, a 10-second refresh, and a backlit LCD, so it doubles as the glanceable display the TP49 is not. The TempPro Sensor app sets personalized temperature and humidity ranges and instantly notifies you when conditions move outside them, and it keeps the history: dynamic graphs with export of up to 2 years of data. The app requires no sign-up.

• Range caveat: the 260ft figure comes from maker tests without obstructions or interference at 77°F/25°C; expect walls to cut it down.
• Power: 2 x AAA batteries (3.0V).
• Precision option: if you need tighter accuracy for a wine cellar or instrument room, the maker's TP359 uses Swiss-made Sensirion sensors at ±0.5°F instead of the TP358's NTC sensors.

The trade-offs: Bluetooth is a home-range technology — it cannot reach you from another city, and there is no WiFi in the unit. If remote monitoring is the requirement, the next pick is the one that does it.

Best accuracy and logging: SensorPush HT1

The SensorPush HT1 is the instrument on this page with the most carefully documented accuracy. Its specifications state ±0.3°C / ±0.5°F typical, ±0.5°C / ±0.9°F maximum temperature accuracy from 0–60°C, and ±3% typical, ±4.5% maximum humidity accuracy from 20–80% RH at 25°C. SensorPush even publishes its yield: 95% of sensors fall within the "typical" range, and sensors outside the "maximum" range are not qualified for sale. It logs: data is collected at one-minute intervals and stored on the sensor for over two weeks, pushed to the app in range, graphed there or exported to CSV.

• Size: 40mm x 40mm x 16.5mm and 23g — smaller than a matchbox, with no display (readings live in the app)
• Power: a CR2477 coin cell, typically over one year
• Range: 100m / 325' line of sight over Bluetooth
• Humidity note: the full 0–100% RH range is covered, but prolonged exposure above 80% RH can create an offset of up to +3% that gradually reverses below 80% — relevant if you are mounting it in a humidor or greenhouse

The killer option is the G1 WiFi Gateway: SensorPush's gateway page describes how it relays the data of any in-range SensorPush sensors to the Internet using your local WiFi or Ethernet, enabling remote monitoring from anywhere via the Internet, a web dashboard, email alerts to multiple addresses, and unlimited free sensor data storage on the SensorPush cloud — no monthly fee. There is no set limit to the number of sensors one gateway can monitor, so a whole property becomes one system, and the maker's site lists humidors, greenhouses, basements and crawlspaces among its target spaces (with 20 days for the HT1, 30 days for the HTP.xw or 45 days for the HT.w of on-board data depending on the model).

The trade-offs: it costs more than a display dial, has no screen of its own, and the gateway is a separate purchase. The CR2477 battery is a mail-order item compared with AAs. If your question is only "what's the humidity right now," the TP49 answers it for less.

Best no-app shelf gauge: AcuRite 00325

The AcuRite 00325 is the honest version of the classic dial on the shelf: a 3 x 2.5 x 1.3-inch indoor monitor that shows temperature and humidity, a Humidity Level Icon indicating high, low or ideal indoor conditions, and daily high and low temperature and humidity records — the minimum useful history for tuning a humidifier. AcuRite's page quotes temperature accuracy of ±2°F and a band-by-band humidity specification: ±3% from 20% to 80% RH, widening to ±4% in the 10–20% and 80–90% bands and ±5% at the extremes. It runs on one AA battery (not included) and carries a limited 1-year warranty.

The trade-offs: the specified humidity range starts at 16% RH, so the driest winter air sits outside it, and the manuals cover models 00325, 00326 and 00327 together — confirm exactly which model a listing ships. There is no app, no alerting and no multi-month history; it is a gauge, and a good one.

Why some popular names are missing

Two products from the strategist's shortlist could not be recommended, deliberately. The Boveda Butler Bluetooth humidor hygrometer is discontinued: Boveda's own FAQ is now titled "What Happened to the Boveda Butler?", and no current product page exists. The Caliber 4R humidity gauge has no reachable official maker site today, so its accuracy claims cannot be verified. And the Govee H5075 — a popular Bluetooth hygrometer — is listed on Govee's official store in single, 2-pack and 3-pack SKUs, but the page publishes no accuracy, battery or range specification we could verify; Govee's store separately lists a Wi-Fi Thermo-Hygrometer, but without a published accuracy spec either. Our picks require a stated, checkable accuracy specification. (Boveda itself stays in this guide for its calibration advice, below.)

Comparison: stated specifications at a glance

Compare specifications and all conditions

TempPro TP49

Humidity accuracy (stated)

±2% (30–80%); ±3% otherwise

Temperature accuracy (stated)

±0.9°F (32–140°F)

Refresh / logging

10-second refresh

All specifications

Wireless

None

Power

1 x AAA

Display

LCD, no backlight

TempPro TP358

Humidity accuracy (stated)

±2% (20–80%); ±3% otherwise

Temperature accuracy (stated)

±0.9°F (32–140°F)

Refresh / logging

10-second refresh; 2-year app history

All specifications

Wireless

Bluetooth 5.0, 260ft

Power

2 x AAA

Display

Backlit LCD

SensorPush HT1

Humidity accuracy (stated)

±3% typical, ±4.5% max (20–80% RH @ 25°C)

Temperature accuracy (stated)

±0.5°F typical (0–60°C)

Refresh / logging

One-minute logging, over two weeks on board

All specifications

Wireless

Bluetooth, 100m line of sight; optional WiFi/Ethernet gateway

Power

CR2477, typically over 1 year

Display

None (app/web)

AcuRite 00325

Humidity accuracy (stated)

±3% (20–80%); ±4–5% otherwise

Temperature accuracy (stated)

±2°F

Refresh / logging

Daily high/low records

All specifications

Wireless

None

Power

1 x AA (not included)

Display

LCD with comfort icon

Full comparison table ↔

Swipe to compare. Row labels stay visible.

Specification	TempPro TP49	TempPro TP358	SensorPush HT1	AcuRite 00325
Humidity accuracy (stated)	±2% (30–80%); ±3% otherwise	±2% (20–80%); ±3% otherwise	±3% typical, ±4.5% max (20–80% RH @ 25°C)	±3% (20–80%); ±4–5% otherwise
Temperature accuracy (stated)	±0.9°F (32–140°F)	±0.9°F (32–140°F)	±0.5°F typical (0–60°C)	±2°F
Refresh / logging	10-second refresh	10-second refresh; 2-year app history	One-minute logging, over two weeks on board	Daily high/low records
Wireless	None	Bluetooth 5.0, 260ft	Bluetooth, 100m line of sight; optional WiFi/Ethernet gateway	None
Power	1 x AAA	2 x AAA	CR2477, typically over 1 year	1 x AA (not included)
Display	LCD, no backlight	Backlit LCD	None (app/web)	LCD with comfort icon

Specification	TempPro TP49	TempPro TP358	SensorPush HT1	AcuRite 00325
Humidity accuracy (stated)	±2% (30–80%); ±3% otherwise	±2% (20–80%); ±3% otherwise	±3% typical, ±4.5% max (20–80% RH @ 25°C)	±3% (20–80%); ±4–5% otherwise
Temperature accuracy (stated)	±0.9°F (32–140°F)	±0.9°F (32–140°F)	±0.5°F typical (0–60°C)	±2°F
Refresh / logging	10-second refresh	10-second refresh; 2-year app history	One-minute logging, over two weeks on board	Daily high/low records
Wireless	None	Bluetooth 5.0, 260ft	Bluetooth, 100m line of sight; optional WiFi/Ethernet gateway	None
Power	1 x AAA	2 x AAA	CR2477, typically over 1 year	1 x AA (not included)
Display	LCD, no backlight	Backlit LCD	None (app/web)	LCD with comfort icon

• TempPro TP49±2% from 30% to 80% RH2± % RH
• TempPro TP358±2% from 20% to 80% RH2± % RH
• SensorPush HT1±3% typical from 20% to 80% RH at 25°C3± % RH
• AcuRite 00325±3% from 20% to 80% RH3± % RH

Source: makers' specification pages (linked in each pick)

How to choose a hygrometer

Read the accuracy spec first, and read its range. A tolerance quoted without conditions is marketing. Every pick here specifies both: the TP49's ±2% applies from 30% to 80% RH, the 00325's ±3% from 20% to 80%, and the HT1's ±3%-typical from 20% to 80% at 25°C with a stated maximum of ±4.5%. If a listing publishes no accuracy at all, treat the readings as a rough indication.

Decide between glance, alert and away. A glance is a display (TP49, 00325, or the backlit TP358). An alert means the meter can reach your phone — Bluetooth like the TP358's 260ft range covers being elsewhere in the house. Away means Internet: only the HT1 plus its G1 gateway gets you readings and email alerts from another city, with the maker's stated unlimited free cloud storage and no monthly fee.

Match the room to the range and the battery. A dry winter bedroom can sit below the AcuRite's 16% RH floor; a humidor or greenhouse sits in the air the SensorPush explicitly serves, with its documented note about readings above 80% RH. AAs are in every drawer; a CR2477 coin cell is a planned purchase.

Give the trend as much weight as the number. The daily high and low records on the 00325 and the 2-year history of the TP358 or HT1 show whether a humidifier is actually holding a room steady — the number alone does not.

1. 1

   Check the stated accuracy

   Find the maker's tolerance and the range it applies to; no spec, no confidence.

2. 2

   Pick the reach you need

   Display only, Bluetooth alerts at home, or a WiFi/Ethernet gateway for remote alerts and history.

3. 3

   Plan the power

   Confirm the battery type (AAA, AA or CR2477) and whether it is included.

4. 4

   Calibrate on a schedule

   Check the instrument against a saturated salt solution; Boveda says re-calibrate a humidor's hygrometer every six months.

Verdict

Buy the TP49 for the everyday glance in every room you care about — it is the cheapest way to a documented ±2% RH reading. Step up to the TP358 when alerts, a backlight and 2 years of trend data would change how you respond. Choose the SensorPush HT1 (with its G1 gateway if you travel or manage a humidor, greenhouse or property remotely) for the most carefully stated accuracy and true minute-by-minute logging. Keep an AcuRite 00325 where a plain gauge with daily records is all the room needs. Whichever you buy, verify it against a salt reference on a schedule — even the best sensor drifts, and Boveda's six-month recalibration rule is a good habit for every hygrometer in the house. Related: our best moisture meters guide for damp walls and wood, and best sound level meters if noise is the other thing you want a number for. Our selection method explains how these picks were researched.