Whether we like it or not (we obviously don't), summer is now a thing of the past.
To make matters worse, that also means winter is a thing of the future; and so, with every passing day, the temptation to turn the heating on is going to grow and grow.
But while we may want to turn the heating on, we don't actually want to turn the heating on - and hike up our bills.
So, how long can we leave it?
Jordan Chance, heating expert at PlumbNation, said a lot of people try and last until the clock change.
He said: "Turning on your central heating is notably one of the sure signs that winter has arrived.
"Although there is no single temperature at which you should turn your heating on, many aim for the time when clocks go back, falling this year on 31 October."
But how can we tough it out and resist flicking on the heating until November or later?
Fear not, Jordan has a few tips.
He advised: "There are a series of ways to delay putting your heating on, keeping you warmer for longer and saving you those extra pennies.
"Using a draught excluder is one of the quickest and cheapest ways to keep your home warm, preventing cold air from entering and warm air from leaving under your doors.
"Keeping your curtains closed, or investing in a thermal curtain lining can likewise help to prevent warm air from escaping - this trick alone can reduce heat loss by up to 25 percent."
Cheers Jordan - bet you're a hoot at parties.
He continued: "Whilst a favourite saying of parents is to 'put a jumper on', this old age argument can certainly keep you warmer for longer, and save the big switch on for a later date.
"It is also important to note that leaving your heating on low all day does not reduce your heating bills.
"Having the heating on only as and when you need it, is the best way to save energy."
And if you've tried all that, have you tried reaching for the tin foil yet?
Jimmy Williams, CEO of Urban Jungle - a company providing insurance to generation rent and millennials - told LADbible: "Make your GCSE physics teacher proud by reflecting the heat back into the room.
"Wrap some card with tin foil and put it behind your radiators, there's no point putting time and effort into organising your heating if half the heat is just going into your walls."
For the time being though guys, make sure you're making the most of the mild temperatures and evening light - because neither will be around forever.