Simple change: for the detail weather screen: Label the high/low temperature as Today, not as Now. Use of the label Now only for the initial weather screen that shows the temperature at this moment.
Rationale: the weather detail screen shows the high and low for each day, not the temperature at this moment (now).
The initial weather page shows the temperature, location and the label Now. It’s showing the temperature at this moment. The detail screen shows daily information, not the current temperature, so it should use Today instead of Now to label the high and low for the day.