Summer Is Murder Around Here

No, literally! And there is data:

Still, the prime time for murder is clear: summertime. Indeed, it is close to a constant, one hammered home painfully from June to September across the decades. And the breakdown of deadly brutality can get even more specific. September Saturdays around 10 p.m. were the most likely moments for a murder in the city.

The summer spike in killings is just one of several findings unearthed in an analysis by The New York Times of multiyear homicide trends. The information — detailing homicides during the years 2003 to 2008 — was compiled mainly from open-records requests with the New York Police Department, and a searchable database of details on homicides in the city during those years is available online for readers to explore at nytimes.com/nyregion.

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Summer is when people get together. More specifically, casual drinkers and drug users are more likely to go to bars or parties on weekends and evenings, as opposed to a Tuesday morning. These people in the social mix, flooding the city’s streets and neighborhood bars, feed the peak times for murder, experts say.

And the trend occurs in other cities, in places like Chicago, Boston and Newark, according to criminologists.

Some of the same trends are on display around Christmastime and are believed to be behind the slight increases in murder that occur then, criminologists say.