As of July 10, 2025, there is a problem with the web service SAM uses to download time zone data when you try to download a weather file using a street address or location name. The workaround solution to this problem for now is to use a latitude/longitude pair to download weather files. One way to find the latitude/longitude for a location is with Google Maps: You can right-click a location on the map, and click the latitude/longitude values to save them to your clipboard, and then paste them into SAM:
We are working on a permanent solution and will update SAM as soon as we have it working. To follow our progress on this, see
github.com/NREL/SAM/issues/2092
.
Best regards,
Paul.