National Weather Service United States Department of Commerce

The average temperature for the month of May most likely will come in about 2 degrees below normal.  None of the official climate sites have reached 90 degrees so far this year, which brings up the question of when we usually hit that threshold.  At Louisville, the average first 90 degree day falls on June 1.  For Bowling Green it is earlier, on May 22, whereas Lexington sees it later, on June 14.  The current forecast calls for 90 degree temperatures at Bowling Green and Louisville this coming Wednesday, June 1.  Should it not happen that day, we may not see the 90s until later in mid June, as the current 6-10 and 8-14 day forecasts from the Climate Prediction Center call for below normal temperatures in those periods (see images below).

6-10 Day Forecast 8-14 Day Forecast