What is the rightmost circle in the weather forecast below the screen lock time of Apple's mobile phone?

On the lock screen interface of Apple's mobile phone (iPhone), there is usually a circular icon to the right of the weather forecast information displayed below the time, which represents the graphical display of the current weather conditions. According to different weather conditions, this icon will change, for example:

The icon of the sun can be displayed on a sunny day;

Cloudy days may show a combination of the sun and clouds;

Icons that may show raindrops when it rains;

Icons that may display snowflakes when it snows;

Thunderstorm weather may display lightning icon;

In addition to the weather icon, this circle may also indicate the current temperature, and sometimes the specific temperature value will be displayed below or next to the icon. This design aims to provide users with an intuitive way to quickly understand the current weather while checking the time.