what is the world temperature average
The earth's average temperature rose by 0.8 Â°C (1.5 Â°F) during the last century. That change is in the mean global temperature that has been calculated for each year since 1880. The history of average global temperature is based on data gathered around the world at weather stations, on ships and by satellites. These records clearly show that the first decade of the 21st century was the warmest since the 1880s, and the first decade that the earth's average annual temperature rose above 14.5 Â°C (58 Â°F).