Diffwys (Gwynedd) weather

Headline:

Turning drier and colder later this week.

Today:

Many inland areas seeing dense fog to start Tuesday, this lingering for some. Rain and cloud moving into southern areas in the morning and spreading across Wales by the evening. Breezy along coasts and over hills. Feeling chilly. Maximum temperature 7 °C.

Tonight:

Remaining damp and cloudy overnight, with rain steadily easing by morning. Breezy in the far south but a milder night than Monday night for most. Minimum temperature 4 °C.

Wednesday:

After a wet and cloudy start, turning drier and brighter for most, with some low cloud lingering in central areas. Temperatures near average but turning colder overnight with a frost. Maximum temperature 9 °C.

Outlook for Thursday to Saturday:

Isolated mist and fog patches to start Thursday, but dry and bright through to the weekend, with the odd shower in western areas Friday. Feeling colder with brisk winds initially.

High pressure will initially dominate, with widely settled conditions and overnight frost. Some showers are likely in northern and western Scotland though, and perhaps along some other western coasts for a time. Later in the weekend, a transition to more unsettled conditions is expected as bands of rain, and associated areas of low pressure, arrive from the North Atlantic, bringing more widespread wet and windy weather. It is likely to remain fairly changeable through the remainder of the period, with occasional rain interspersed with brighter, showery spells. Whilst colder conditions will be possible at times, especially at first, it will often be mild, with temperatures near or a little above average for the time of year.

Changeable or unsettled conditions are expected through late November and into early December, as Atlantic frontal systems track close to or across the UK at times. These will bring periods of rain and strong winds, perhaps with some snow in the north, mainly over hills, interspersed with brighter, more showery interludes. Temperatures will often be mild, particularly away from the far north where brief colder interludes are possible. Although confidence is low, there may be a tendency for the track of low pressure systems to shift southwards later in the period. In this scenario, rain will still be likely at times, especially across central and southern parts of the UK, while more northern areas may become somewhat drier, and all parts may become somewhat colder.