Since 1901, the average surface temperature across the contiguous 48 states has risen at an average rate of 0.16°F per decade (see Figure 1). Average temperatures have risen more quickly since the late 1970s (0.31 to 0.54°F per decade since 1979).
Has temperature risen in 100 years?
Climate Change Over the Past 100 Years. Global surface temperature has been measured since 1880 at a network of ground-based and ocean-based sites. Over the last century, the average surface temperature of the Earth has increased by about 1.0o F.
How much has the earth's temperature increased?
Yes. Earth's average surface air temperature has increased by about 1 °C (1.8 °F) since 1900, with over half of the increase occurring since the mid-1970s [Figure 1a].
