Over the last few days, temperatures have been above the 9°C average for this time of year, sitting firmly in double figures at 12 to 13°C, but this is all set to change as early as tonight (November 17).
Overnight, temperatures will plummet significantly to lows of 3°C in some places across London and it's not going to get much warmer when the sun rises on Friday November 18.
The Met Office warns of cold spells as we move into the weekend, for Friday it says it will be "feeling quite cold", with maximum temperatures of around 8 °C.
As we move into Saturday, that will dip to around 7°C, the weather forecast predicts, saying there will be "mainly dry with sunny spells but rather cold with overnight frost."
So what is causing this sudden drop in temperature?
Nicola Maxey from the Met Office told getwestlondon : "We have a weather front crossing the country which is bringing some colder air behind it, so it's moving in from the north west down to the south east."
The chill in the air that we will be feeling is the polar maritme air from the north, that sweeps in behind the weather front, causing temperatures to drop to single figures.
"You will certainly notice the difference," said Mrs Maxey.
"There could well be the odd shower around as well, which will make it feel that little bit cooler"
And it's not getting much warmer here in London as we move into next week.
Mrs Maxey added: "Sunday certainly looks as though we're going to see a blustery day with some heavy rain around and then as we go into the start of next week, still an unsettled picture with some cooler temperatures, probably 8-9°C, so staying cooler and a little unsettled."
So dig out those hats and scarves if you are heading out over the next few days, as it look like you are going to need them.
Keep up to date with the latest news in west London via the free getwestlondon app.
You can even set it to receive push notifications for all the breaking news in your area.