Syon House (Greater London) weather

Headline:

Dry but frosty tonight. Bright Sunday.

This Evening and Tonight:

A dry and mostly clear night with another widespread and locally hard frost developing. Breezy to start but winds generally falling light away from coasts. Minimum temperature -4 °C.

Sunday:

Another largely sunny day, but winds lighter than Saturday. Still feeling very cold. Then likely turning cloudy overnight with a chance of occasional snow showers in the west. Maximum temperature 2 °C.

Outlook for Monday to Wednesday:

Mainly dry and sunny Monday and much of Tuesday. A chance of rain or snow and strong winds later Tuesday into Wednesday. Very cold initially, less so later.

Rather changeable, as Atlantic frontal systems attempt to cross the UK from the west to bring occasional outbreaks of rain, but preceded by snow in some areas, more especially central, northern and eastern parts of the UK, perhaps giving some significant snow accumulations in places, particularly on northern hills. These low pressure systems, whilst could bring some periods of strong winds, will be interspersed with quieter, drier interludes under transient ridges of high pressure with the potential for frost, and wintry showers along coasts exposed to northerly winds. A continuation of this general pattern is favoured into the following week, although perhaps with temperatures trending closer to average such that the frequency of wintry hazards, especially in the south, may reduce slightly.

The outlook through the second half of January is very uncertain, with no strong indication for any particular weather pattern to dominate. As such, conditions are most likely to be changeable. Spells of wet, windy and mild weather are possible at times, along with colder, drier interludes with overnight frost and fog. Snow and ice remain possible, especially in central and northern parts of the UK, but the chance of these is lower than earlier in the month.