Temperatures in the Mile High City dipped to freezing overnight triggering a frost advisory. More rain and thunderstorms are possible Friday afternoon, forecasters say.

Areas of frost could be an issue before 9 a.m. as the low dropped to 32 degrees at Denver International Airport, according to the National Weather Service in Boulder.

Otherwise, it will be mostly cloudy Friday with a high temperature near 54. There’s a 20 percent chance of showers and thunderstorms after 3 p.m.

A warm up under mostly sunny skies is on the way for this weekend with temperatures rising to 64 degrees on Saturday and 70 on Sunday, the NWS says.

Very warm temperatures are expected the first part of next week with highs of 78 degrees on Monday and 79 on Tuesday, forecasters say.

The highs will remain in the upper 70s through Thursday, the NWS says.