Tucson hit 100 degrees Tuesday - tying the city's record for a streak of 39 days of 100 degrees or higher.

The 100-degree mark was set at 2:39 p.m., said Ken Drozd, a meteorologist with the National Weather Service.

"We barely touched 100 degrees - tying the 39 days (streaks) that were hit in 2005 and 1987," he said.

Today's high is forecast at 98 degrees, "so we may not break the record," Drozd said.

Thunderstorms were expected to hit the Tucson metro area Tuesday night, "and that will produce clouds that may inhibit the heating" today, he said. With moisture in the air it is hard for the temperatures to rise, he explained.

Last month was the hottest June on record in Tucson. Everyday hit 100 degrees or higher, and the average temperature of 89.5 degrees put June as the hottest, breaking the old mark of 89.2 degrees in June 1994, National Weather Service records show.

The official readings are taken at Tucson International Airport.

Contact reporter Carmen Duarte at cduarte@azstarnet.com or 573-4104.