Methods

Daily temperature readings are recorded once a day as reported highs and lows from weather.com.  These readings are taken just before sunrise and at the end of the day locally.

Values are compared against historical average highs and lows as compiled at weather.com.  Temperature anomaly is calculated as [(current high - average high) + (current low - average low)]/2.  Daily values are continuously averaged within each month and displayed graphically.

Excel Data Files
Blue numbers signify temperatures more than 3 degrees below average.
Green numbers are within 3 degrees from average.
Red numbers are more than 3 degrees above average.

Columns F and G show average temperatures (as calculated above), and average highs, respectively.

Africa
Antarctica
Asia
Europe
Greenland
Middle East
North America
Oceana
South America

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