It's not quite the Indian summer some had promised - although the weather should remain dry and sunny, for today (September 23) at least.

Mixed conditions and colder nights are in store for Britain as the autumn equinox arrives.

Sporadic rainfall is expected tonight and tomorrow - as Ladbrokes announced it is odds-on that 2015 will be declared the wettest year on record.

Temperatures are expected to warm up towards the weekend - with nights set to get chillier.

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Laura Young from the Met Office, said this mixed bag of weather is typical for autumn.

She said: "As with any seasons there is a transitional phase.

"Certainly it can be quite settled but it can also be quite volatile in September, it all depends.

"We have had a mixture of wet and windy and very warm and dry.

"We have had a good mixture which is fairly typical for September."

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A woman rushes for cover as rain pours in the City, last week. Picture: Anthony Devlin/PA Wire

The south will be clearer than the "blustery" north on Thursday, but with some light showers.

Weather will warm up on Friday with temperatures hitting around 18C, with a few showers that will become lighter and less frequent - leaving everywhere dry by the end of the day.

Heading into the weekend, most of the UK will be dry with some sun and patchy cloud, with maximum temperatures remaining at 17/18C in the south.

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Due to clear skies, nights will start to get more chilly as temperatures dip into single figures.

Ms Young said: "There is quite a lot of sunshine around on the weekend, particularly on Saturday.

"It will mainly be staying dry and that will hang around until the middle of next week. That could bring mist and fog overnight."

She said Britain is set to see "warm days and chilly nights because we are going into that autumn weather".

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Meanwhile, Ladbrokes announced there is a 6/5 chance this year goes down in history as the wettest yet.

The bookies are offering 4/1 that this September will notch up the same accolade.

Alex Donohue of Ladbrokes said: "As every drop of rain falls the odds follow suit, and it's now looking increasingly likely that 2015 will be chalked up in the history books as the wettest year we've ever seen."