Turn off a/c outside temp is xx

Configuration
1

Looking to setup an automation to turn off my air-conditioning (ecobee thermostat) when the outside temperature is less than 77 degrees.

I can find weather temperature but not sure how to set the less than 77 degrees part

2

Use a Numeric State Trigger with below: 77 to trigger the automation when the sensor, monitoring exterior temperature, decreases below 77.