How to write the title of the broken line statistical chart of weather forecast?

The title of the broken-line statistical chart of weather forecast usually needs to include the following elements:

1. Time range: The title needs to clearly indicate the time range covered by the statistical chart, such as "weather forecast this week" and "weather trend in the next seven days".

2. Statistical object: the title should clearly indicate the weather indicators and statistical objects involved in the statistical chart, such as "temperature change trend", "rainfall statistics" and "air quality index change".