A high temperature of 95 degrees will go into the Boise weather record books for May 13, the National Weather Service in Boise said.
The previous record of 94 degrees was set in 1959, according to weather service meteorologist Dave Groenert.
The average high for May 13 is 71 degrees, Groenert said.
The scorching temperatures won't stick around though. Tuesday high is expected to reach the mid-70s, Wednesday should tip the scales around 80 - and then it could get a little wet.
Groenert said a slow-moving system is expected to arrive Thursday. With it will come a chance of showers through Friday night.
The weekend forecast is iffy at this point, according to Groenert. There could be another little system coming through, he said. But one computer model has the area drying out.