Deke Arndt posted an article last week in NOAA’s “Beyond the Data” blog on how to answer questions about extremes in temperature using the NCEI website and database.  You can read about it at https://www.climate.gov/news-features/blogs/beyond-data/back-basics-temperature-truisms.  If you need this information for stations beyond the NCEI list, you can probably get them from your local state climatologist or the Southeast Regional Climate Center (or other regional climate center, if you are not in the Southeast).

Source: Bernard Gagnon, Commons Wikimedia
Source: Bernard Gagnon, Commons Wikimedia