Weather, or the atmosphere’s state at a specific time and place, is inconsistent. You would probably notice that most weather forecasts air numbers of times in a day and sometimes you can see a slight change between the weather news of the morning and late afternoon. Clouds, temperature, winds, and location greatly affect the inconsistency in weather.
When clouds gathered a lot of evaporated water from a body of water near a city, for example, there is a good chance that it will precipitate in that city when the winds will pass by it and the clouds are heavy. This is the reason why sometimes on a hot, summer day, rainfall is possible especially to cities near water bodies.