Not sure why those websites are reporting those numbers. I saw that too. However, here is the very reliable National Weather Service (NOAA) report out of Grey Maine.

331 AM EST Wed Feb 1 2023
...WIND CHILL WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH LATE
SATURDAY NIGHT...
* WHAT...Dangerously cold wind chills likely. Wind chills as low as
50 below zero possible.
* WHERE...Portions of west central and western Maine. Portions of
northern New Hampshire.
* WHEN...From late Thursday night through late Saturday night.
* IMPACTS...Wind chill values may fall to life threatening levels.

https://forecast.weather.gov/wwamap/wwatxtget.php?cwa=GYX&wwa=wind%20chill%20watch