Now that meteorological autumn is here, it's time to start thinking about the first frost dates. They could be sooner than you think!

This week temperatures will be dropping away as much as eight degrees below-average, with overnight temperatures even getting locally sub-zero. So a frost may even be on the cards this week.

The average first frost for many inland areas in the UK and Ireland is within the first ten days of November, but with some parts of Scotland up to a month earlier. Generally the further north you are, the earlier the frost.

For the Scottish Highlands its usually from early September, however the TemperatureRadar indicates that locations much further south could be sub-zero in the coming days.

High Peak in Derbyshire could see temperatures on Thursday night 12th September fall to around 1°C, with 3°C in Luton and 4°C in London too. Be sure to wrap up warm for your commute Friday morning!

Frost commonly forms on a clear night when the temperature of a surface, such as the ground or your car, falls below zero, and then below the dew point, so that moisture can be deposited as frost.

Under clear skies and light winds, the ground temperature can drop a few degrees lower than the air temperature, though this is more difficult at the start of the season when the ground is still holding residual warmth from the summer.

Keep an eye on our TemperatureRadar in the coming days to see if your location may be hitting sub-zero!