What city was the warmest on February 2, 2004?

How much warmer (in degrees) was it in Phoenix than in Chicago on February 2, 2004?

How much colder (in degrees) was it in Punxsutawney than in Brownsville on February 2, 2004

How much warmer (in degrees) was it in Denver than in Fargo on February 2, 2004?

How much warmer was the warmest city on the map (in degrees) on February 2, 2004, than the coldest city on the map?

How many degrees warmer was Chicago on February 2, 2004, than Fargo?

If the temperature was 15 degrees in Fargo on February 3, 2004, how much would the temperature have increased (in degrees) over February 2?