But spare a thought for Mortlake residents where it dipped to -3.3 at 4.20am - the coldest spot in Victoria.

However, it was not the coldest day for Mortlake this year, which recorded -3.4 on June 9.

Bureau of Meteorology duty forecaster Tom Delamotte said it was the coldest morning of the year for both Warrnambool and Port Fairy, which got down to 0.5 at 6.14am.

At the Portland airport it was exactly freezing at 6.19am.

The bureau is tipping frost this morning with early fog patches before a partly cloudy day with light winds.

Mr Delamotte said clear skies and light winds were behind the early morning cold starts.

"There's been a slow moving pattern dominated by high pressure with no fronts to pick the wind up," he said.

There was a frost warning this morning for the south-west, Wimmera, North Country, and North Central districts.

Warrnambool is expecting a top of 14 degrees, Hamilton 14, Colac 13, Ararat 14, Casterton 15, Mortlake 14, Heywood 15, Portland 13, Port Fairy 13, Terang 13 and Camperdown 12.

For the week ahead - Warrnambool on Monday will be partly cloudy with a top of 13 degrees, Tuesday mostly cloudy 14, Wednesday partly cloudy 16, Thursday partly cloudy 15, Friday mostly cloudy 16, Saturday mostly cloudy 16 and Sunday showers 12.

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