On Tuesday morning, it was cool and clear.

The weather change from cool and clear in the morning to light rain and fog in the afternoon, followed by warmer and clear conditions the next morning, is indicative of a warm front passing through the area. A warm front occurs when a warm air mass moves over a cold air mass, causing the warm air to rise and condense, leading to precipitation. After the front passes, the area experiences warmer temperatures and clearing skies.

References:

Integrated Physical Sciences resources on weather fronts and their effects.

Meteorological studies on the impact of warm fronts on local weather patterns.