Daily Temperature Trends Around the World

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The circular visualizations show the average daily temperatures from 2011 to 2020 for twelve selected major cities around the world. The cities were purposefully selected to represent different seasonal patterns, temperature ranges and regions of the world.

The temperature trends are encoded by position on the polar coordinate system and by common color-temperature association with red-brown being hot and blue representing cold temperatures. Annotations label the temperature on two different scales, as degree Fahrenheit and degree Celsius.

The cities are sorted by latitude, visualizing the change from cold winters and hot summers (Northern latitudes) to stable temperatures (equator) to cold winters and hot summers (Southern latitudes). The latitude is illustrated by a secondary color encoding applied to each city name. Specific city labels annotated along the legend aim to help the viewer to match cities to the latitudes. In the alternative version cities are sorted by average daily temperature across all years.