I did some digging around myself and found some additional places you may want to look for daily observations, records, and such in the United States. The Iowa Environment Mesonet provides a large amount of various weather data. You can find records for National Weather Service COOP sites across the states at
https://mesonet.agron.iastate.edu/COOP/extremes.php?network=WACLIMATE&month=7&day=9&tbl=climate51. Observations from weather-observing networks can be found here
https://mesonet.agron.iastate.edu/request/daily.phtml?network=WA_ASOS. If you know the station identifier, you may also use
https://mesonet.agron.iastate.edu/wx/afos/old.phtml to see some climate reports from the past two years or so, but it is limited to an archive of 1,500. To use this, you would enter CLI, plus a station identifier, to find Daily Climate Reports published by National Weather Service Offices. An example would be "CLIPSC", this will bring up climate reports for the Tri Cities Airport since June 23rd, as of today. You results will vary on this one though. You can find the station identifiers by going to
https://mesonet.agron.iastate.edu/sites/networks.php?network=WA_ASOS&format=html. These links default to Washington State, as that is the state I live in, but you can select any state and network you wish. You may also just have fun poking at anything you can find on their main site
https://mesonet.agron.iastate.edu/ and clicking the categories in the gray bar with "Apps" through "Webcams". If you need help navigating any of the sites, I can help you.