Best HomeKit Humidity Sensors in 2020

The Onvis SMS1 Smart Motion Sensor packs in humidity, temperature, and motion-sensing all in one awesome little package. The SMS1 uses two AAA batteries, and connects to HomeKit via Bluetooth 5, skipping the need for an additional hub. This direct-to-HomeKit approach means you can monitor your home's humidity in a matter of minutes, and it can even work without a home network, which makes it perfect for travel.

Despite being named after its temperature sensing ability, the Aqara Smart Home Temperature Sensor also keeps tabs on humidity. This sensor uses a Zigbee radio for connectivity to the Aqara Smart Home Hub, which not only helps with speed and reliability but also allows it to come in at an affordable price. These sensors are also incredibly tiny, keeping them neatly out of sight.

As its name suggests, the iHome 5-in-1 Smart Monitor includes five smart home capabilities, including humidity. iHome's monitor also includes temperature, motion, light, and sound sensors, which can tie into HomeKit automations and scenes or with the iHome Connect app. Unlike other sensors, this one isn't portable, but it does have a handy display, which shows you the status of your home 24/7.

The Eve Degree is the only HomeKit sensor around that can report humidity and temperature both indoors and out. This beautiful sensor has an IPX3 weather-resistant rating, allowing it to act as your own personal weather station when it is outdoors, giving you a more accurate picture of the temperature around you. For the indoors, the Eve Degree includes a non-obtrusive LCD display.

In addition to temperature and humidity sensors, the Kaiterra Laser Egg + CO2 includes carbon dioxide and air quality monitoring, providing actionable information to help you correct issues as they arise. This sensor is also completely portable, with a built-in rechargeable battery that allows you to move freely from room to room, all while keeping tabs on your surroundings.

While Arlo's Baby camera is meant for the nursery, its incredible feature set makes it perfect for just about anywhere. The Arlo Baby features humidity, temperature, and air quality sensors, as well as a built-in nightlight and rechargeable battery, making it highly capable for its price. Oh yeah, it also includes a 1080p video camera that connects to HomeKit which enables notifications and two-way audio.