Interesting...Australian inland has seasonal 'weather', with the chance of dumping down rain about Christmas time, and into January and February.
This is brought about by 'The Wet' of the top end, which can be predicated on the intensity of Monsoons over the Bay of Bengal and the Andaman sea. If India has a big Monsoon, the Top End does too.
If the mid regions of NSW are fortunate, we get steady summer rain from the fag end of the wet. If we aren't, then we flood - big time.
We get our winter rain inland, which we rely on to do our cereal cropping as it is too warm in summer.
Our climate is west to east and so we can pretty much predict what is going to happen within the coming week, with little nuances after South Australia where the weather curls up into inland NSW due to the geological configuration of The Great Dividing Range of Vic. and NSW.
We get Highs coming up from the Antarctic, normally, with Lows descending over the interior, which tends to 'lock in' the Highs over Central Australia, causing a slow passage of hot days and cool nights due to the lack of cloud with the High Systems.
It's all pretty predictable for us...but then there is the East coast which is where it gets a little dicey. The weather is determined by prevailing winds with winter westerlies, and in Summer, the benign Nor'Easters with the southerly lows that careen up the coast around about 4 oclock in the arvo. (afternoon)
What I've just described is over a massive area and so, it CAN be predictable to a greater degree...but an area like the East coast of NSW has all sorts of anomalies that create micro climates that will alter regional weather...I would imagine that the Islands of the UK would be rather difficult to read due to the associated variables, similar to the East coast of NSW - then the alternating temperatures of the Ocean to the West, the land mass of Europe, and the heat from Northern Africa and the Mediterranean which just buggers up any attempt at rational predictability - Still - It makes for polite conversation when there's nothing else to speak of. Dunt'it.