Freezing temperatures in the upper 20s are predicted for the Duncan area on Monday night by the National Weather Service.
Before the cold snap hits, the temperature is supposed to get into the mid 80s on Sunday with southwest winds 20 to 25 mph and a 40 percent chance of thunderstorms.
Temperatures will turn colder Sunday night with lows in the upper 30s, the weather service said. North winds 20 to 30 mph with gusts around 45 mph are forecast.
There is a 50 percent chance of thunderstorms Sunday night.
On Monday, highs will be in the lower 50s with north winds 25 to 30 mph and a 20 percent chance of rain.
Monday night skies will be mostly clear with lows in the upper 20s, but the weather service said the high on Tuesday will be in the lower 60s with a low that night around 40.