sensor

Aqara Temperature and Humidity Sensor

budget Owned and reviewed local: excellent Zigbee

Price: $18.98 verified Sep 14, 2026
HA fit: excellent
Works offline: yes
Setup: easy
Hub needed: yes

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Aqara Temperature and Humidity Sensor - Tiny, cheap Zigbee sensor reporting temperature, humidity and atmospheric pressure

Owner’s hands-on review ★★★★★

Are they accurate? Maybe. Are they cheap enough I don't care? Yes

Here’s how I think about temperature sensors for home automation. I reach for them for one of a few reasons:

Comfort - I want a room held at a certain temperature or humidity.
Function - I want to act on a reading, like turning a bathroom fan on when someone is showering and back off once the humidity drops.
The “I’m an idiot” reason - I forget to shut the drink fridge or the garage freezer. In one case the drinks went warm and a wall of ice built up at the back; in another, an open freezer door spoiled close to a thousand dollars of food while my wife and I were at the hospital for a couple of days. Coming home to that is no fun.

For those last two categories I don’t need accuracy, I need a delta - a change worth alerting on. For the comfort category you can apply an offset so the reading tracks true, but our Ecobee has temperature pucks, so I usually lean on those for comfort instead.

Site owner · 2026-06-09

Quick verdict

Aqara's classic Temperature and Humidity Sensor is a tiny, cheap Zigbee unit that also reports atmospheric pressure. It pairs locally through zigbee2mqtt or ZHA and supports calibration offsets. At this price you can scatter them around the house for room-by-room climate data in Home Assistant.

Standout: Tiny, very cheap Zigbee sensor that reports temperature, humidity and atmospheric pressure.

Notes last checked May 25, 2026.

Compatibility snapshot

Home Assistant excellent

Apple Home none

Google Home none

Alexa none

Works offline yes

Setup easy

Extra hub needed yes

Power battery

Local control facts

Home Assistant: zha integration, Local Polling (home-assistant.io, checked Sep 10, 2026)
Zigbee2MQTT: supported device, listed as Aqara WSDCGQ11LM (Temperature and humidity sensor) (zigbee2mqtt.io, checked Sep 10, 2026)

Why it stands out

measures temperature, humidity and atmospheric pressure in one tiny unit
very cheap, so easy to place several around the house
supports per-sensor calibration offsets in zigbee2mqtt

Reasons to hesitate

requires a Zigbee coordinator (Aqara officially supports only their own hub, but ZHA/zigbee2mqtt work well)
Xiaomi/Aqara Zigbee devices can occasionally drop off non-Aqara meshes
battery device reports on intervals, not instantly

Best for

Zigbee Home Assistant setups wanting cheap room climate monitoring
tracking temperature, humidity and pressure trends across multiple rooms

Avoid if

you have no Zigbee coordinator
you want a built-in display

Privacy and local-control notes

Pure Zigbee device with no cloud component. Fully local when paired to a Zigbee coordinator via zigbee2mqtt or ZHA.

Home Assistant support: supported · integration path: zigbee2mqtt / ZHA.

Buying reality check

Price notes: About $20 list on Amazon (verified 2026-08-28; historically often under $15, so watch for sales). Model WSDCGQ11LM.

Verified price reads: lowest seen $18.98, latest $18.98 on Sep 14, 2026.

Sep 14, 2026$18.98amazon
Sep 5, 2026$19.99amazon
Aug 28, 2026$19.99amazon

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Verified against

The compatibility notes above have not been through the source audit yet. The manufacturer's page is here; the notes were last checked May 25, 2026.

Spotted something wrong? Report an error on this page and I will check it against the source and fix it.

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