The weather outside's very moody, so smarten up your home heating with a Wi-Fi enabled thermostat that learns from your actions and keeps the inside toasty warm

The Commercial Electric Smart Thermostat is reasonably priced, easy to install, and lets you control your home's temperature with your phone or voice, but extra features are limited.

The very affordable Amazon Smart Thermostat lets you control your heating and cooling system from your phone or via Alexa voice commands.

This top-rated smart thermostat can protect you from unpleasant temperatures and potentially lower your energy bills. And this Prime Day can help you save even more money!

The fourth-generation Nest Learning Thermostat uses AI to create customized heating and cooling schedules, helping you save on energy usage while ensuring even temperatures throughout your home.

Nest’s new flagship thermostat has a sleek new look and promises to help you save money on heating and cooling by adapting to outdoor temperatures and air quality.

The Sensi Touch 2 is a feature-rich smart thermostat with a large color touch screen, support for several popular home automation platforms, and compatibility with up to 15 remote sensors for balanced temperatures in every room.

Keep your house warm this winter while saving money with deep discounts on smart thermostats.

You can control the moderately priced, Wi-Fi-enabled GE Cync Smart Thermostat with your phone or voice, but it works with fewer third-party devices than the competition.

The smart-home device is on sale now for $119.

The sleek Ecobee Smart Thermostat Enhanced lets you control your HVAC system and monitor your home with your voice or phone for $60 less than the Premium model.

The feature-rich Ecobee Smart Thermostat Premium controls your heating and cooling, works as a smart speaker and security device, monitors air quality, and supports lots of third-party platforms.

The sub-$100 Wyze Thermostat lets you accurately control the cooling and heating in home with your phone or via Alexa and Google Assistant voice commands.

The Sinope TH1123WF smart thermostat is solely for line-voltage electric heating systems, but it offers Wi-Fi connectivity and works with several smart home devices and services for an affordable price.

Developed with Honeywell Home maker Resideo, the thermostat should be compatible with most HVAC systems, Amazon says.

The Sensi ST55 is a reasonably priced smart thermostat that’s easy to install and works with numerous home automation and voice control platforms.

The Sensi Touch ST75 is a smart thermostat you can control with your phone, voice, and a color touch-screen panel. It offers temperature and humidity alerts and usage reports, as well as support for several smart home platforms.

The relatively affordable entry-level Nest Thermostat lets you control your heating and cooling system by phone or voice, set temperature schedules, and offers energy-saving features that can help lower your bill.

The $129.99 Nest Thermostat is the company's most affordable model yet. It's available for pre-order now in gray, light pink, mint, or white.