Queenslanders had to endure yet another uncomfortable night of sleep as the country-wide high humidity levels caused temperatures to stay in the high 20s overnight.

Today will remain above 30 degrees in the Sunshine State, but Monday and Tuesday will be cooler as a thunderstorm is predicted to sweep across the majority of the state that evening.

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It happens at the same time that Weatherzone is forecasting a diverse range of weather for the following week, including the possibility of tropical cyclones, 45-degree temperatures, server thunderstorms, and flooding rain, as per 9News.

Summer in Australia is a busy time for weather, according to Weatherzone.

This is due to the summer months receiving the longest and most intense solar heating of the year, which supplies plenty of energy for extreme weather.

The wet weather is anticipated to spread to New South Wales and the Northern Territory after the rain and storms hit Queensland at the beginning of the week.

Northern and eastern Australia could be affected by this system's heavy rain, flooding, and severe thunderstorms, with Queensland probably receiving the most accumulated rainfall.

The harbor city anticipates a sunny 29 degrees with calm winds in the evening.

It will be cloudy and 21 degrees in the Victorian capital in the morning, with a 90% chance of rain, but it will clear up in the afternoon.

33 degrees, clouds, and humidity will be present in the city, with a small chance of precipitation.

Perth, which is in the west, will have mainly sunny skies and a scorching 39 degrees.

There is a slight chance of rain and a cooler 21 degrees in the city of churches.

There will be showers and a high of 18 in the city.

Summer pause

Put on your winter coat. South-east Australia is expected to experience its coldest February day in 20 years on Friday as temperatures across the region plummet, as per ScienceDaily.

On Friday, a potent cold front is expected to sweep across South Australia, Victoria, New South Wales, and Tasmania. It is currently pushing up from southern Australia.

Major cities will experience abrupt temperature drops due to the front, with minimum temperatures of 12C in Melbourne and 13C in Adelaide expected.

And while snow has fallen in the Alps in February before, Dean Narramore, a senior meteorologist with the Bureau of Meteorology, said it is unusual.

According to him, many people will experience Thursday and Friday as winter days rather than the height of summer.

And seeing temperatures so far north in South Australia, as well as in parts of northern Victoria and New South Wales inland regions, is unusual for this time of year.

Although it hasn't yet broken any records, it could get close in some places to some of the coldest February days ever recorded.

We don't typically see snow in the summer, but we occasionally do every few years when we get these kinds of powerful cold fronts.

Normal high-pressure systems over southern Australia at this time of year prevent these stronger fronts from passing through. But this cold air is coming from the south of the country thanks to a powerful high-pressure system west of Perth.

According to Narramore, the amount of snow expected in the Alps won't exceed a few centimeters, and the cold snap should end by Saturday.

Northern New South Wales and even southern Queensland will experience sunnier, drier days at the other end of the weather system. And several days of sun and heat are forecast for Sydney and Newcastle.

According to Narramore, NSW could experience an unusual situation where the north experiences heatwave conditions while the south experiences wintery conditions.