The precise time of London's first snowfall this year has been predicted by a new weather forecast. Additionally, this long-range forecast indicates that the first snowflakes will fall sooner than you might think. The first snowfall in London is expected to occur on November 30, according to Accuweather's long-range weather forecasts for the upcoming months. "Periods of snow and rain in the morning; mostly cloudy," is their prognosis.Temperatures are due to reach 9C, with 1.5cm of rain and 0.2cm of snow forecast. The next time snow is forecast by Accuweather will be on December 14, where "a bit of morning snow" is expected.It's worth bearing in mind that these forecasts are very long term, and are subject to change. The Met Office's long range forecast, which covers the whole of the UK, does not mention snow being forecast.However, they mention unsettled conditions towards the end of November: "There will probably be a change towards more unsettled conditions for a time. This means an increased chance of periods of wet and windy weather for parts of the UK, perhaps more so in central and southern areas."The Met Office also explains why they don't include more detail in their long range forecasts. They say that beyond around five days into the future, seemingly small events in the atmosphere can have significant effects, but that it's very difficult to predict just how it will play out in our weather.And if you've ever wondered why it seems to snow less in London than everywhere else in the UK, here's why.

Ian Currie, a weather expert in Coulsdon, has previously explained the reasons why an area like Croydon would see less snow in comparison to other areas of London closer to the countryside.Mr Currie said: "Croydon is about two or three degrees warmer than rural areas just a little to the south, and, of course, it is built up. Lots of buildings make the snow actually landing less likely. It is quite low-lying too. The pattern is usually for snow to gather in the more elevated areas."