Inaccurate cold temperatures

For some reason, the temperatures are very inaccurate when the temperature falls below 20 degrees, unless perhaps it’s the projected high for the week.
Currently the claim is 15 degrees, today, 01/02/18 @0620, zip code 17814, I can say, there isn’t a 15 degree temperature in a 20 miles radius, and very likely not for the next 72 hours..??

Tollster about Weather Live°, v5.7