Answered by Shaykh Yusuf Weltch
Question: Is it permissible to make up missed prayers at the time between Sunrise and Salat al-Zhuhr?
Answer: In the Name of Allah, Most Merciful and Compassionate
May Allah bless you for your inquiry.
It is permissible to make up missed prayer between sunrise and up until just a few minutes prior to the entering of Zuhr time.
There are 3 times, in which any obligatory or necessary prayers performed therein would be invalid (i.e. regarding those prayers whose obligation was established before the entering of these times.) [Maraqi al-Falah] They are:
1) From the rising of the sun (which signifies the end of Fajr) until it fully rises and becomes clearly visible (appx 15 mins after sunrise)
2) When the sun is at its zenith until it declines (signifying the entrance of the time of Zuhr prayer), and,
3) When the sky becomes yellowish and the sun’s light becomes weak, such that one can bear to look at it until it fully sets (this is near the end of the Asar prayer time. (Maraqi al-Falah)
Allah Knows Best
[Shaykh] Yusuf Weltch
Checked and Approved by Shaykh Faraz Rabbani