Residents in an Australian city basking in warm weather today should brace for a significant temperature drop, with forecasts indicating a fall of up to 20 degrees tomorrow.

In Melbourne, temperatures peaked at 28 degrees today, though the “feels like” temperature hovered closer to 25 degrees, influenced by a mix of winds and rain, as reported by the Bureau of Meteorology.

By tomorrow, the city is expected to see a high of just 13 degrees, with the temperature feeling as chilly as five degrees.

Weatherzone predicts that the perceived temperature will remain below eight degrees for much of the day.

This sudden chill is attributed to a low-pressure system and an accompanying cold front advancing from South Australia into Victoria.

It will reach eastern districts by tonight, bringing a sudden drop in temperature, winds and showers with it.

Meredith, Winchelsea, Derrinallum, Skipton, Ballarat, Ocean Grove, Frankston and Cowes are also in the firing line.

A cooler southerly flow will then extend over the state tomorrow, as the low moves east towards the Tasman Sea.

The cold front may also cause snowfall in the Victorian Alps for the second time this week.

Rain will be lashing the city pretty much non-stop from this evening until about 7pm on Sunday.

By then, however, the temperature is set to be slightly warmer.

Temperatures are set to reach a maximum of 16 degrees later in the day, but the early hours of the morning will feel closer to five degrees.

Weatherzone said rapid day-to-day fluctuations are fairly common in the springtime in Melbourne.

Temperatures can reach into the 40s in summer, but because a cool change usually follows extreme heat, the average maximum in the warmest month of January is actually 26 degrees.

Similarly, the average maximum for the coolest month of July is 13.5 degrees – similar to how tomorrow will feel.

The maximum temperatures are calculated based on the ambient temperature of the air itself, while the “feels like” temperature is measured by the ambient temperature, humidity, and wind chill to more accurately assess how a person would feel sitting outside in the shade.