Nest Temperature Sensor is the top pick among smart temperature and humidity sensors under $40, rated 4.6 stars across 16,639 customer reviews.
GoogleNest Temperature Sensor
4.6(16,639)10% OFF$39.00$34.99
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
GoogleNest Temperature Sensor (2nd gen)
4.4(1,320)$39.98
X-SenseSTH0B Smart Thermometer Hygrometer
4.5(719)5% OFF$12.99$12.34
SwitchBotMeter
4.2(15,264)$13.99- Price alerts
Temperature & Humidity Sensors under $40, 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.
SwitchBotIndoor/Outdoor Thermo-Hygrometer
4.2(9,988)15% OFF$14.99$12.74
AqaraTemperature and Humidity Sensor
4.2(5,603)$19.98
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
AeotecMultipurpose Sensor
4.5(366)$38.99
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
AqaraClimate Sensor W100
3.8(133)$39.99
AeotecaerQ Temperature & Humidity Sensor
3.5(173)$34.99
ArloAll-in-One Sensor
4.1(94)7% OFF$29.99$27.90
MerossSmart Temperature and Humidity Sensor
3.6(88)$14.99
ShellyBLU H&T Display ZB
4.4(48)$25.99
AeotecTriSensor 8
3.6(38)$39.99
ArreTemperature Sensor
2.9(52)$39.99
SonoffSNZB-02B AirGuard TH Lite
$9.90
ShellyBLU H&T ZB
$22.99
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Frequently asked questions
What are the best smart temperature and humidity sensors under $40?
Nest Temperature Sensor, SwitchBot Meter Plus and YoLink Smart Wireless Thermometer Hygrometer lead our ranking of smart temperature and humidity sensors under $40, ordered by customer rating weighted by how many reviews back it. The full list compares 28 products in this price range.
How many smart temperature and humidity sensors cost less than $40?
This page tracks 28 smart temperature and humidity sensors under $40 from 13 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 $40 drops off this list on the next update.
Looking for more than $40?
See all the temperature & humidity sensors in the catalog, compared side by side on specs, price and rating.