Here are some links. I could NOT find the one from several years ago. These will have to do.
They are USA only,
RECORD LOWS STATE BY STATE: I was surprised a little when I found this info. several years ago that my State of Pennsylvania had a record LOW, Lower than Ohio, Indiana, Illinois, Massachusetts and Connecticut.
Smethport,PA. was –42F/-41C on January 5, 1904. My Hometown of Phoenixville has the RECORD high of 111F/44C on July 10,1936
This one has the Record HIGH by state, Record LOW by state. Also LOWEST monthly average and HIGHEST monthly average.
This one record High and lows by state with the dates/Cities/Celcius and Fahrenheit.