It's a consensus: Slight increases or *decreases* in temperature allegedly cause more weather extremes

I’m waiting for a global-warming blizzard. Really | Cynthia Tucker

Climate scientists say that warmer temperatures will not necessarily produce weather than is consistently hotter everywhere but rather weather patterns that are more extreme. There will be more droughts, but there will also be more floods.

Newsweek on the cooling world

Here is the text of Newsweek’s 1975 story on the trend toward global cooling. It may look foolish today, but in fact world temperatures had been falling since about 1940. It was around 1979 that they reversed direction and resumed the general rise that had begun in the 1880s, bringing us today back to around 1940 levels.
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Meteorologists think that they can forecast the short-term results of the return to the norm of the last century. They begin by noting the slight drop in overall temperature that produces large numbers of pressure centers in the upper atmosphere. These break up the smooth flow of westerly winds over temperate areas. The stagnant air produced in this way causes an increase in extremes of local weather such as droughts, floods, extended dry spells, long freezes, delayed monsoons and even local temperature increases – all of which have a direct impact on food supplies.
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Climatologists are pessimistic that political leaders will take any positive action to compensate for the climatic change, or even to allay its effects. They concede that some of the more spectacular solutions proposed, such as melting the Arctic ice cap by covering it with black soot or diverting arctic rivers, might create problems far greater than those they solve.