Every decade, the global average temperature increases by roughly 0.3 degrees Fahrenheit. While we're on the topic of the hottest places on Earth, how many of these sweltering regions can you name? <section data-block="TypeRush"><h2>The 5 Hottest Countries in the World</h2><ul><li></li><li></li><li></li><li></li><li></li></ul></section>How many of the hottest countries on Earth were you able to list? THE HOTTEST COUNTRIES ON EARTHMalidmbaker/GettyImagesMali tops the list as the hottest country in the world, with an average annual temperature of 85.2 degrees Fahrenheit in 2023. By 2040, Mali’s average temperature is predicted to rise by another 1.2 degrees Fahrenheit.