Which measurement indicates the current atmospheric pressure?

The measurement that indicates the current atmospheric pressure is the barometric reading. A barometer is an instrument specifically designed to measure atmospheric pressure, and it provides readings that reflect changes in the air pressure that can be associated with weather conditions.

When atmospheric pressure rises or falls, it can indicate various weather patterns, such as approaching storms or clear skies. The barometric reading is essential for meteorology and helps in forecasting weather conditions.

The other measurement options reflect different atmospheric conditions but do not measure atmospheric pressure. A thermometer reading indicates temperature; a hydrometric reading measures moisture content or water level; and a psychrometer reading assesses humidity levels in the air. Each of these plays a role in understanding weather but does not directly provide information about atmospheric pressure like a barometric reading does.