Why does the Xiaomi Smart Band 9 Pro stop displaying weather data after midnight?

The Xiaomi Smart Band 9 Pro stops displaying weather data after midnight because of how the weather information is managed and updated.
When the band is connected to the Mi Fitness APP on your phone, the APP periodically sends the weather data for the next seven days to be stored on the band. Weather information is updated in real-time, as it requires high accuracy. At midnight, cached weather data is cleared to avoid displaying outdated information, and the latest forecast data is reloaded. This ensures that the weather information shown remains accurate, especially when the band is offline.
Note:
The weather data for the Xiaomi Smart Band 9 Pro updates every 30 minutes. To ensure this, the Mi Fitness APP must remain active in the background on your phone. If the APP is removed from the background, the weather will update once the APP is reopened and the data syncs.