What does it indicate if the barometer starts to rise after a day of rain?

When the barometer starts to rise after a day of rain, it typically indicates that high pressure is moving into the area, leading to improving weather conditions. High pressure is generally associated with clearer skies and more stable weather patterns. The rise in barometric pressure signifies that the atmospheric conditions are becoming more favorable, often resulting in a gradual cessation of precipitation and the potential for sunshine to return.

In contrast, if the barometer were to fall, it would suggest that low pressure is approaching, often linked to unsettled weather and the likelihood of continued rain or storms. Rising pressure following a rainy period is a classic meteorological sign that the stormy conditions are subsiding and that better weather is on the horizon. This is why the correct choice emphasizes improvement in the weather following the observed change in barometric pressure.