A stylus has a stylus barrel and a stylus nib that can move with respect to the stylus barrel. A first pressure sensor is configured to sense air pressure that corresponds to force being supplied to the stylus nib and a second pressure sensor serves to sense ambient air pressure. A control circuit operably couples to both pressure sensors and determines a gauge pressure value as corresponds to force being applied to the stylus nib. By one approach a temperature sensor can also operably couple to the control circuit and provide temperature information that the control circuit can utilize when determining the aforementioned gauge pressure value.