Today's high hit 77 degrees at 12:39 p.m., and the low was 63 degrees at 6:03 a.m. at Tucson International Airport, according to the National Weather Service.

On Saturday, the forecast calls for mostly cloudy skies with a slight chance of showers and thunderstorms.

The high is expected to be between 79 to 84 degrees, and the low between 52 to 58 degrees, says the weather service.