Saturday will be mostly sunny in Billings, with a high near 79 degrees on the first day of summer, according to the National Weather Service.
Look for a 20 percent chance of showers and thunderstorms Saturday evening before midnight. The low will be around 53, with a north wind of 7 to 13 mph.
On Sunday, there's a 30 percent chance of showers and thunderstorms, mainly after noon. The day will be mostly cloudy, with a high near 74 degrees.