In 1900 the temp was 0 degrees
For each decade, the temp went up 10 degrees.
1910 10 degrees 1950 50 degrees, 1990 90 degrees.
In 100 years, the average temperature was 50 degrees.
This is the average temperature gauge in my neck of the woods.
What is the average is a joke. What is tge all time high and low is a joke.
The problem with temperature is in the example above. The 'average' really is a stupid measure when the flux spans a 40-50 degree swing.
The temp was 25 degrees, the avg is 52, but every year, on this date the temp was either +/- 10-15 degrees of 52 for the past 100 years