The weather forecast sometimes reports high temperature first and then low temperature, such as 9 to 3 degrees, but sometimes the opposite is true. Why?

That is determined according to the following time. For example, if you watch the weather forecast at night, it is the data of the meteorological station at 20 o'clock. After 20 o'clock, the lowest temperature appears in the evening, and then the highest temperature is in the daytime the next day, so when reporting, it is the lowest and then the highest. If you listen to the weather forecast in the morning, the highest temperature of the day will appear at noon, and then the lowest temperature at night.