Here are a few useful websites to download soil and water-related data sets:

1. Rainfall/Temperature: https://mrcc.purdue.edu/CLIMATE/
2. Rainfall/Temperature/Wind: https://www.ncei.noaa.gov/cdo-web/
3. Rainfall/Temperature (1950-2010, for SWAT model): https://www.ars.usda.gov/plains-area/temple-tx/grassland-soil-and-water-research-laboratory/docs/us-climatic-data/
4. Elevation: https://apps.nationalmap.gov/downloader/
5. Elevation/Landuse/Soil: https://gdg.sc.egov.usda.gov/GDGHome.aspx
6. Elevation/Land cover/Landsat/Radar: https://earthexplorer.usgs.gov/
7. Soil: https://websoilsurvey.nrcs.usda.gov/app/