Sheriff Matt Warren: Did you know, Putnam, more people are murdered at ninety-two degrees Fahrenheit than any other temperature? I read an article once - lower temperatures, people are easy-going. Over ninety two, it's too hot to move. But just ninety-two, people get irritable. -- It Came From Outer Space (1953)

I totally thought they'd just made that up cause this movie was not exactly big on scientific facts. Shows what i know. Link

The researchers found that a temperature rise of one standard deviation -- which, in the United States today, occurs when the average temperature for a given month is about 3° Celsius higher than usual -- increases the frequency of interpersonal violence by 4%, and the risk of intergroup conflict, such as civil war or rioting, by 14%.

Ofc, further down the article, the conclusions made by this study are contradicted. But still, you should watch out for trails of glitter mysteriously leading to your closet. Might be aliens.

A 3°C change is about equal to 5.4°F