Penmaenmawr (Conwy) weather

Headline:

Dry but cold for New Year's Eve.

This Evening and Tonight:

Dry throughout Tuesday evening and overnight with a mixture of clear spells and variable cloud. Turning chilly underneath the lengthiest clear skies with a widespread frost and some freezing fog patches. Light winds. Minimum temperature -4 °C.

Wednesday:

A frosty start to New Year's Eve with fog locally lingering until late morning. Elsewhere, plenty of winter sunshine. Cloud building into the evening with a breeze, but dry. Maximum temperature 5 °C.

Outlook for Thursday to Saturday:

Cloudier on New Year's Day with showery rain. Turning colder, especially in the strengthening wind, with the increased risk of wintry showers into the weekend. Frost and ice overnight.

Cold northerly winds dominant across the UK in the first week of January. These will bring wintry showers (often of snow) to many coastlines (and areas just inland of these) that are exposed to onshore winds. Day-to-day changes in wind direction will change the places most exposed to the showers, but many inland locations across central and southern areas will remain mostly dry but cold - some more coherent bands of rain, sleet and snow working south at times. Into the second week of January slightly milder conditions will attempt to move in from the west, with a risk of further snow on the leading edge of these turning to rain. Colder regime more likely to the north with average to just below average in the south.

Whilst confidence in details is low, by the start of this period the transition back to westerly winds bringing Atlantic weather systems into the UK is expected to be complete, with temperatures most likely recovering to around or just below average. There is perhaps a weak signal for slowly evolving weather patterns to be more favoured than normal, such patterns increase the chances of frost and fog above normal by night.