The burning-hot sun on background of blue sky and clouds

May 2018 Was Hottest on Record in St. Louis

It wasn't just you feeling the heat.

June 01, 2018 - 5:15 pm

ST. LOUIS (KMOX) - St. Louis didn't just break a heat record last month -- it was shattered.
May 2018 was the hottest May on record in St. Louis, with an average temperature of 75.4 degrees -- that's calculated by averaging all daytime highs and overnight lows.

That's 10 degrees above average.

What happened? A weather pattern called upper-level ridging, or high pressures in the atmosphere, that's not normally seen until July or August, according to National Weather Service senior meteorologist Thomas Spriggs.

The good news? Spriggs says it doesn't necessarily mean a sweltering summer.
"Certainly a record-warm May sets it up better for what could be a really hot summer, it would make that more attainable, in a way," he says. "But at the same time, its patterns often do switch after such a period of time, in a few weeks or so."
This year beat the previous record -- set in 2012 -- by a full 2 degrees.