14 day UK weather forecast

Quiet start but turning much colder.

UK outlook issued Sunday 21st October 2018

Week 1

Quiet start but much colder later.

Monday: Any early rain in the south quickly clears to leave bright conditions across the south but there will be more cloud at times in the north. In northern and western Scotland outbreaks of rain are likely, and the damp conditions could extend eastwards at times. Cooler than recently, especially in the south.

Tuesday, Wednesday, Thursday: Wet weather affects the north on occasion but the south stays dry and bright. Temperatures pick up and in the south it could be quite warm for the time of year during sunny spells.  

Friday, Saturday, Sunday: At the start of the period patchy outbreaks of rain clear southeastwards and they are followed by much colder conditions. Showers develop and in the north some of them turn to snow even at low levels, and there may be some wintryness mixed in farther south too. The risk of nighttime frosts increases.

Forecast confidence is high falling to moderate later on.

Week 2

Rather cold.

All regions have a cold start and in the south east there could be some showers. During the course of the week temperatures are expected to remain below the seasonal average for much of the time. Through the second half of the week the risk of periods of rain  increases in all regions and it could be cold enough for snow to fall over the Scottish mountains. 

Forecast confidence is moderate.

Overview

Week 1

High pressure will be the dominant feature of the weather during the first few days. Through the second half of the week it becomes centred farther west in the Atlantic and that allows cold Arctic air to plunge southwards towards the UK. There are some similarities with the October 2008 cold snap which brought snow to much of the UK.

Week 2

Early in the period the UK may be under a trough with high pressure areas centred to the northeast and the southwest. It could keep quite a cold air mass in place over the country. Later on an Atlantic flow may begin to return.

Points of note

The first Arctic blast of the season is expected. Snow is possible in the northern half of the UK even at low levels.

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The 14 day UK weather forecast is updated twice weekly.

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