London (Greater London) weather

Headline:

Staying mild and rather cloudy overnight. Turning breezy Tuesday.

This Evening and Tonight:

Some clearer spells possible at first, but cloud likely thickening again during the evening and overnight. The odd spot of coastal drizzle is also likely to drift inland to southern counties, but otherwise dry. Remaining rather mild. Minimum temperature 7 °C.

Tuesday:

Mostly cloudy and rather windy conditions, although some brighter breaks likely at times. Outbreaks of rain may extend erratically south into northern areas toward midnight. Still mild. Maximum temperature 11 °C.

Outlook for Wednesday to Friday:

Wednesday, windy with some heavy rain later, perhaps turning wintry as it clears overnight. Much colder Thursday and Friday with strong winds and isolated wintry showers gradually easing.

A cold start to this period, with overnight frost and a mix of snow, sleet and rain showers in the north. Milder air may make inroads from the south during the first weekend, bringing snow, rain and perhaps strong winds, but the northern extent of this is unclear and it may be that most or all of the UK remains in the colder air. The second week of January then looks rather varied, with high pressure, cold air and wintry showers more likely across the north, spells of rain and strong winds more likely in the south and an uncertain balance between these two regimes. Overall, temperatures are more likely to be below normal than above, but day to day variation is likely.

Slowly-evolving weather patterns look most likely mid-month, although the flavour of the weather depends on the balance of high and low pressure - initially it may well be a continuation of similar conditions to the week before. As we go through the month, it is possible that spells of strong wind, rain and snow may return more widely as unsettled conditions in the Atlantic start to have more influence over the UK. There are no strong signals for any significant cold snap, but day to day variation of temperatures is likely and there will probably be some cold interludes between milder spells.