You may scoff, but that's a real possibility for a crazy weather day in Orange on Sunday, with a warm morning and afternoon followed by a cool change and potential snow either late in the night or early on Sunday morning.

Bureau of Meteorology senior forecaster Jake Phillips said warm winds would keep the temperate for Sunday well above average before the breeze shifted to a westerly, blowing a low pressure system similar to the one which dumped up to 20 centimetres of snow on the region last week over Orange.

However, this system is less likely to bring snow, with only a chance of it on Sunday night or Monday morning.

"The temperature will actually be warm on Sunday, 16 or 17 [degrees] during the day, and won't get cold until late on Sunday evening," Mr Phillips said.

"It's come in from the west and cross to the east on Sunday night."

There may also been rain on the way next week, with an 80 per cent chance of either snow or rain on Sunday night, with further high chances of rain on Tuesday and Wednesday.

Both days are only expected to bring one to five millimetres of rain, however, according to weather forecasting website Weatherzone.com.au.

Less than a millimetre is projected for Thursday.