The temperature format can be changed individually for each device added to the Alexa app. To change the temperature format (units): Open the Amazon Alexa app. Tap . Tap Echo & Alexa. Tap to select th...The temperature format can be changed individually for each device added to the Alexa app. To change the temperature format (units): Open the Amazon Alexa app. Tap . Tap Echo & Alexa. Tap to select the desired Alexa device. Tap Measurement Units. Tap to select the desired measurement unit.