Can we use location, grid_id as features

[cszc]

I believe that question has already been answered here:

Clarification on features' dates used for prediction

The ground truth from the training period is available for developing your model. You may use that model when running inference. The example you provided sounds like it reflects information on weekly averages from that period in your model, which is fine to do.

Please let me know if you need additional clarification.