Dear Zohaib,
I do not know where you can find data for Pakistan locations. You may be interested in this
discussion on the ResearchGate website
.
If you are willing to pay for the data, some of the commercial data providers listed on the
Weather Data page
may provide data for Pakistan. Those companies may provide weather data in formats that SAM can read (SAM CSV, TMY3, TMY2, or EPW). If they provide the data in CSV format, it is easy to convert the data to the SAM CSV format, which is described in SAM's help system.
Best regards,
Paul.