I agree with most of what you stated however... > If you go look at Wunderground's calendar view, you can see the historic temperature records for each day - l

I agree with most of what you stated however... > If you go look at Wunderground's calendar view, you can see the historic temperature records for each day - lows and highs. With few exceptions, the records have all been set in the past few decades. How long have we been tracking these records?