Firework fans will need to wrap up warm tomorrow for Bonfire Night as temperatures are set to plummet during the coldest night of the week following an unusually warm autumn spell.
London and surrounding Home Counties will see lows of around three degrees Celsius while northern England and Scotland are expecting chills of below zero degrees.
However, the Met Office warned that temperatures in some parts of Scotland would drop as low as -4C "fairly easily" while many people would be outside enjoying public and private firework displays.
Kate Brown, a Met Office forecaster, said: "It got to -0.3C in Northern Scotland last night so we're looking at it getting a bit colder over the next couple of nights.
"It will get that cold but it won't last."
Warmer temperatures of around 5 to 6 degrees will be felt in coastal areas of Norfolk, Kent and Cornwall.
The visibility of dazzling pyrotechnic displays is expected to be obscured somewhat by possible smog forming due to calm conditions allowing bonfire smoke to remain in the air, with most of it to be seen in the Midlands, according to the MetOffice.
However, the majority of the UK is predicted to stay dry with signs of light showers in parts of Cornwall and the Scottish Isles.
The warm spell will return on Thursday with average night temperatures increasing by five degrees nationwide and possible showers.
Bonfire Night, or Guy Fawkes Night, is celebrated annually to remember Guy Fawkes of the Gunpowder Plot who wanted to blow up the Houses of Parliament and assassinate King James I in 1605 before he was arrested on 5 November.Reuse content