A cold front will pass over NSW from west to east between Saturday morning and Sunday night, dragging a large pool of cold Southern Ocean air across with it.

Showers and some thunderstorms are likely to develop near and behind the front, with rainfall expected in most districts at some point during the weekend.

In NSW, the best falls from this system are likely to occur over the slopes and ranges, the southern inland and the northern half of the coast. These areas will see widespread totals of 5-15mm and some places could collect 10-20mm.

While the heaviest rain is likely to develop ahead of and near the front, some of the showers that occur in its wake will be falling in a mass of very cold air. This should cause areas of snow and possibly small hail in some parts of the state.

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Snow is likely to settle on the alps and southern ranges by Sunday. As the cold air moves further north, temperatures could get low enough for snow to fall in elevated areas of central and even northern NSW at some point between Sunday and next Tuesday.

Goulburn's predicted top temperature for Monday is a chilly ten degrees, with a minimum of 2.

Looking further ahead, a high pressure system will bring a return of drier and calmer weather to most of NSW during the middle of next week.