SwitchBot Meter Plus is the top pick among smart temperature and humidity sensors under $20, rated 4.5 stars across 3,567 customer reviews.
SwitchBotMeter Plus
4.5(3,567)15% OFF$17.99$15.29
YoLinkSmart Wireless Thermometer Hygrometer
4.7(817)5% OFF$16.14$15.33
GoveeHygrometer Thermometer H5104
4.5(2,112)$13.99
SwitchBotMeter Pro
4.6(708)$19.99
X-SenseSTH0B Smart Thermometer Hygrometer
4.5(719)5% OFF$12.99$12.34
SwitchBotMeter
4.2(15,264)$13.99
SwitchBotIndoor/Outdoor Thermo-Hygrometer
4.2(9,988)15% OFF$14.99$12.74
AqaraTemperature and Humidity Sensor
4.2(5,603)$19.98- Price alerts
Temperature & Humidity Sensors under $20, updated as prices fall
We check the price of every Temperature & Humidity Sensor in the catalog daily, and email you the ones that drop into this range.
SonoffLCD Smart Temperature Humidity Sensor
4.2(3,275)$15.90
SonoffSNZB-02DR2 AirGuard TH
4.4(587)$14.90
SonoffSNZB-02WD
4.4(509)$19.90
SonoffSNZB-02P Temperature & Humidity Sensor
4.0(1,504)$16.90
X-SenseSmart WiFi Indoor Thermometer
4.5(161)5% OFF$12.99$12.34
SonoffSNZB-02M AirGuard TH Pressure Sensor
4.4(136)10% OFF$19.90$17.91
SonoffSNZB-02 Temperature & Humidity Sensor
3.6(337)$16.99
CentraliteTemperature & Humidity Sensor
3.7(219)$19.95
MerossSmart Temperature and Humidity Sensor
3.6(88)$14.99
SonoffSNZB-02B AirGuard TH Lite
$9.90
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Frequently asked questions
What are the best smart temperature and humidity sensors under $20?
SwitchBot Meter Plus, YoLink Smart Wireless Thermometer Hygrometer and GoveeLife Hygrometer Thermometer H5104 lead our ranking of smart temperature and humidity sensors under $20, ordered by customer rating weighted by how many reviews back it. The full list compares 18 products in this price range.
How many smart temperature and humidity sensors cost less than $20?
This page tracks 18 smart temperature and humidity sensors under $20 from 8 brands, with prices starting at $9.90.
Are these prices up to date?
Prices come from each product's Amazon listing and are re-checked continuously, so every card shows the latest price we have. A product whose price rises above $20 drops off this list on the next update.
Looking for more than $20?
See all the temperature & humidity sensors in the catalog, compared side by side on specs, price and rating.