This Wednesday night, people across the nation will gather eagerly to celebrate the arrival of the new year.

So, what weather conditions can revellers anticipate in Australia’s key cities on New Year’s Eve?

Here’s the December 31 weather outlook for Australia’s major metropolitan areas:

Temperatures are predicted to be slightly cooler than in recent years, yet still comfortable, with highs reaching 27 degrees.

While there is a slight chance of rain, with predictions suggesting no more than a millimetre, the festivities in the Harbour City are unlikely to be significantly affected.

However, the rain is expected to be no more than a millimetre, meaning festivities in the Harbour City shouldn’t be dampened too much.

Whilst it is highly unlikely to rain, temperatures will be as low as 14 degrees in the morning, with the wind chill factor making it feel even colder.

The BOM projects it to be cloudy and about 16 degrees at midnight.

That said, it will warm up on New Year’s Day in Melbourne, with temperatures climbing to 25 degrees.

It is set to be mostly sunny, though there will be a bit more cloud about as the day wears on.

The cloud cover could make it a humid and muggy night, with temperatures set to be sitting at around 25 degrees at midnight.

There could also be a bit of rain about on New Year’s Day, with up to four millimetres potentially falling on January 1, 2026.

It will at least be milder at midnight, with temperatures expected to sit at 22 degrees, but it will be warm again on New Year’s Day, with peaks of 35 degrees expected.

A slightly cool and cloudy morning will give way to sunny skies and temperatures of around 26 degrees in the afternoon.

It will cool again in the evening, dropping to around 15 degrees for the countdown to 2026.

The first day of the new year will be a warm one, with temperatures expected to hit 30 degrees.

Temperatures won’t even reach the 20s, with a top of 19 degrees expected for New Year’s Eve.

The nation’s capital could receive some stormy weather to see out 2025.

Up to three millimetres of rain may fall, potentially impacting new year’s festivities.

The rain will disappear on New Year’s Day, with a cloudy day with tops of 25 degrees expected.

It will hit a top of 35 degrees during the day, with showers expected in the afternoon and evening.

Up to 15mm could fall on the 31st, whilst storms could follow on New Year’s Day, with temperatures of 33 degrees and another 15mm of rain potentially facing the city.