V. Soto You can also download the historical daily Alaska Climate data from the ERA5 climate re-analysis dataset archive website https://www.ecmwf.int/en/forecasts/datasets/reanalysis-datasets/era5
Moreson, you can download climate data variables from the NCEP/NCAR Reanalysis dataset website archive
The daily climatic data of any point on the globe is accessible from the MarkSim GCM available for free. These data is available for Max temp, min temp, rainfall and radiation... This data is ready to be used in the DSSAT model... Please try..