Dew point value incorrect for weather underground 
It looks like the dew point that is being received from weather underground is in degrees (f) but being interpreted incorrectly as degrees (c) and then “converted to degrees (f) resulting in a number like 50 degrees for dew point showing up on HomeKit as incorrectly as approx 113 degrees (f)

if the bug is not obvious I can give you my login info to test. I can see this mixed units in the homebridge configuration UI which I attached here.
![DE05E4ED-6E7F-4054-A5CC-E17514AB6298](https://user-images.githubusercontent.com/54040140/106344151-e47fe680-625d-11eb-8889-f8a56c9c9c0d.jpeg)
