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    Forecast summary

    • Regional
    • UK 5 days
    • UK 6-30 days

    Regional forecast for Wales

    Rain and cloud clearing this evening.

    This Evening and Tonight:

    Rain and low cloud will clear to the south leaving a dry night with light winds. It will turn colder under clear spells, with frost, patchy fog, or low cloud forming by dawn. Minimum Temperature -1 °C.

    Monday:

    Chilly in places with fog tending to clear to leave a bright and mostly sunny morning. Turning cloudier through the afternoon with some hill fog forming overnight. Maximum Temperature 8 °C.

    Outlook for Tuesday to Thursday:

    Tuesday will be mild and cloudy with patchy drizzle and fog over high ground. It will be mostly cloudy thereafter with spells of rain, mainly in central and southern parts.

    Updated at: 1503 on Sun 17 Dec 2017

    UK forecast for the next 5 days

    Rain moving southeast, clearing tonight.

    This Evening and Tonight:

    Rain clearing southern parts this evening, leaving a dry but cold night with light winds and clear spells across most of the UK. Frost, patchy fog, and low cloud may develop in places.

    Monday:

    A cold morning, with some fog patches slow to clear through the day. A dry and bright day for many with light winds. Some cloud and rain in the northwest.

    Outlook for Tuesday to Thursday:

    Slow-clearing fog in places on Tuesday with patchy rain and drizzle in the west. Turning drier and brighter in the north Wednesday and Thursday, cloudy with patchy rain further south.

    Updated at: 1501 on Sun 17 Dec 2017

    Outlook for the UK over the next 6-30 days

    UK Outlook for Friday 22 Dec 2017 to Sunday 31 Dec 2017:

    In the run up to Christmas it is most probable that the UK should see temperatures near to or above average for the time of year. On Friday it will probably start mainly fine and dry with bright spells for many. However, skies are likely to turn cloudier in the north and west with outbreaks of rain developing into Saturday. Into the Christmas period, timings remain uncertain, however rain and cloud should clear southeastwards, leaving drier, brighter and colder conditions for a time. Showers are likely for some, and these could turn wintry in the north. In the period between Christmas and New Year, very unsettled conditions look likely with gales at times, and perhaps showery conditions in the north and west.

    Updated at: 1245 on Sun 17 Dec 2017

    UK Outlook for Monday 1 Jan 2018 to Monday 15 Jan 2018:

    At the start of the new year, it is likely to be unsettled and often windy across much of the UK. Temperatures will be near to or below average and snow is likely, at times, especially across northern parts of the country. Through the first half of January confidence becomes very low, but longer periods of more settled weather may become established. This would lead to prolonged spells of drier and colder conditions, as well as an increased likelihood of overnight frost and fog. Any milder, wetter, and windier spells should become more short-lived during this period.

    Updated at: 1246 on Sun 17 Dec 2017

    Location Details

    Ystrad Mynach

    Location: 51.6396, -3.2347

    Altitude: 102.0 m above mean sea level

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