Because of global warming due to increasing greenhouse gases, the maps from the late 1800s and the early 1900s are dominated by shades of blue, indicating temperatures were up to 3°C (5.4°F) cooler than the twentieth-century average.

In the late 19th century, scientists first argued that human emissions of greenhouse gases could change the climate. Many other theories of climate change were advanced, involving forces from volcanism to solar variation. During the 1970s, scientific opinion increasingly favored the warming viewpoint.

Mean global temperatures then stabilized at roughly 14.0°C (57.2 °F) until the 1980s. The world has mainly grown hotter since 1980, at a rate of nearly 0.2 °C (0.36 °F) per decade….Temperature Change Since 1880.

In fact, 2016 was the hottest year ever recorded. In April 2020, the NOAA (National Oceanic and Atmospheric Administration) was predicting that 2020 had a 75% chance of beating that record (Source)….The Ten Hottest Years on Record

• 2015.
• 2017.
• 2018.
• 2014.
• 2010.
• 2013.
• 2005.
• 2009.

According to the extended forecast in the 2021 Farmers’ Almanac, summer should be stormy, with a greater-than-average frequency of thunderstorms for a large portion of the country. Many of these storms will be strong, particularly over the eastern third of the nation.

August

U.S. Winter Weather Forecast 2020-2021 We’re predicting a light winter for most of us here in the United States, with warmer-than-normal temperatures in the forecast for a large part of the country. Uncommonly chilly temperatures will be limited mostly to the western states and northeastern New England.

It’s almost the end of the year and we still haven’t had any snow this winter. No fair! It’s almost the end of December and so far London is yet to see any snow this winter.