Medford soared into the triple digits at 1:53 p.m. Tuesday, the National Weather Service reported.

Medford soared into the triple digits at 1:53 p.m. Tuesday, the National Weather Service reported.

It's the first time the heat has climbed above 99 degrees this year.

The last time temperatures broke the 100-degree mark was July 26, 2013, weather officials said.

The temperature continued to climb until it hit 105 degrees at the Medford airport — where temperature readings are taken for the city — at 4:22 p.m.

A building high pressure system is responsible for the temperature spike.

Weather officials have said they expect a slight cooldown starting today, when the forecast calls for a high of 93. Officials say the high temperatures will stay in the mid- to low 90s for the rest of the week.