The National Centers for Environmental Information are probably a good place to start. Collection of links to data can be found here: https://www.ncdc.noaa.gov/

The National Centers for Environmental Information are probably a good place to start. Collection of links to data can be found here: https://www.ncdc.noaa.gov/data-access/quick-links https://www.ncdc.noaa.gov/data-access/quick-links. Alternatively there are some collected sets available here (which may be a little cleaner/ have some metatdata annotation): https://public.enigma.com/search/climate https://public.enigma.com/search/climate.