Dear Ana,
I wasn't sure which CSP model you are using, so I checked results in the physical trough and molten salt power tower model with a couple of different NSRDB TMY3 files from SAM's solar resource library. In my tests, the temperature data that SAM shows for the weather file and in the results seem consistent.
For example, here is data from SAM for the physical trough model with the "USA AZ Tucson International Ap (TMY3)" weather file:
Are you seeing something different?
Best regards,
Paul.