IPA: /ˌbærəˈmɛtrɪkli/
KK: /bærəˈmɛtrɪkli/
In a way that relates to or uses a barometer, which is an instrument for measuring atmospheric pressure.
The weather forecast was determined barometrically, using the latest readings from the station.
Barometrically → It is formed from "baro-" (from Greek "baros", meaning weight) and "metron" (meaning measure). The word refers to measuring atmospheric pressure, hence the term barometrically relates to the measurement of weight in the atmosphere.
Think of 'weight' ('baro-') being measured ('metron') to remember that barometrically refers to measuring atmospheric pressure.