I heard this phrase in a weather broadcast on a radio. It says something like:
on the first part of the day, the temperature is ... and on the second part of the day, the temperature is ...
My question is whether the first part of the day is referring to the morning or the whole day time, and the second part of the day is referring to the afternoon or the whole night time.
My impression to that context is that they are referring to the morning and afternoon respectively. But I am not quite sure about it. Appreciate if someone can help me with this.