K E Y W E A T H E R N O T E S

A very dry month across the British Isles. Often changeable following a settled start. A chilly first Highest Temperatures – January 2019 week, followed by a milder interlude mid-month, but Station Temperature cold during the last 10 days with widespread snow and overnight frosts. Slapton, Devon [England] 14.2˚C

1st -9th - High pressure remained anchored across British Isles keeping conditions generally settled and dry. Despite a few very Cardiff, [Wales] 13.9˚C cold nights in places in the east, the high pressure was filled with stubborn stratiform cloud that refused to clear. The 7th to the 11th saw high pressure drift westwards allowing a few weak frontal Shawbury, Shropshire 13.2˚C systems to topple around the top of the high-pressure cell. This [England] producing a few spots of light rain in places, however many locations in southern parts of England remained largely dry. It Hurn, Dorset [England] 12.7˚C gradually turned, with the warmest day nationwide occurring on the 12th where temperatures widely peaked between 11-13°C across much of the country. A maximum of 13.9°C was recorded Murlough, County Down [N 12.6˚C at Cardiff, Wales. Ireland]

th th th Lossiemouth, Moray 12.2˚C 13 – 16 – A more mobile pattern developed from the 14 as [Scotland] low-pressure systems drifted in from the west. This brought some wet and breezy conditions, with temperatures remaining mild.

17th -25th – As low pressure drifted eastwards this brought a surge of cold arctic air from the north on the 17th. Sleet and snow Lowest Temperatures – January 2019 showers drifted into Scotland and northern parts of England. The 18th saw a band of rain, sleet and snow spreading westwards, this Station Temperature giving some small accumulations across the hills. 19th to the 22nd remained chilly with some sharp overnight frosts. Braemar, Aberdeenshire -14.3˚C [Scotland] 24-26th – A deepening area of low pressure advanced from the west on the 24th. This brought some of the wettest conditions of Loch Glascarnoch [Scotland] -13.0˚C the month, but also the mildest. A maximum of 14.2°C was recorded at Slapton, Devon. Heavy rain on the 26th across Scotland saw 33.1mm at Altnaharra. Tulloch Bridge [Scotland] -11.5˚C

27th-31st – As low pressure pulled away to east on the 27th it Topcliffe, North Yorkshire -10.7˚C introduced another surge of arctic air from the north. This [England] brought in frequent sleet and snow showers. The closing days of the month saw widespread bitterly cold temperatures, St Harmon, Powys, [Wales] -9.8˚C cumulating in a low of 14.3°C at Braemar, Aberdeenshire. The lowest temperatures recorded in the UK since 2013.

Mailligan, County Down [N -8.5˚C Ireland]

Highest Temperature

Slapton, Devon 14.2˚C

Lowest Temperature

Braemar, Aberdeenshire -14.3˚C B R A E M A R

Highest 24hr Rainfall

Altnaharra, Sutherland 33.1mm

M A L H A M T A R N

Highest 24hr Snowfall

Malham Tarn, N Yorks 16cm

Strongest Wind Gust B E R R Y H E A D Berry Head, Devon 82mph S L A P T O N

2

SCOTLAND

RAINFALL TEMPERATURE FROST

48.1% -0.4˚C 121%

NORTHERN ENGLAND

RAINFALL TEMPERATURE FROST

42.5% -0.2˚C 113%

NORTHERN IRELAND

RAINFALL TEMPERATURE FROST

45% +0.9˚C 76%

WALES THE MIDLANDS

TEMPERATURE FROST RAINFALL TEMPERATURE FROST RAINFALL

-0.2˚C 120% 55.7% +0.1˚C 110% 48.2% FROST

SOUTH-EAST ENGLAND SOUTH-WEST ENGLAND FROST RAINFALL TEMPERATURE FROST

RAINFALL TEMPERATURE FROST

42.7% -0.7˚C 133% 55.3% -0.5˚C 107% 3

S C O T L A N D

Mean Temperature Monthly Rainfall

Aberdeen -0.4˚C Aberdeen 30.2mm A L T N A H A R R A L O S S I E M O U T H

Altnaharra -0.3˚C Altnaharra 119.2mm A V I E M O R E A B E R D E E N B R A E M O R E Aviemore 73.6mm T U L L O C H B R I D G E Aviemore -0.1˚C

Braemar -1.1˚C Braemar 50.4mm

G L A S G O W E S K D A L E M U I R Edinburgh +0.0˚C Edinburgh 10.0mm

Eskdalemuir -0.6˚C Eskdalemuir 69.6mm

Glasgow -0.1˚C Glasgow 59.8mm

Tulloch Bridge -0.6˚C Tulloch Bridge 104.6mm

4

W A L E S

Mean Temperature Monthly Rainfall

Valley +0.5˚C Valley 50.2mm

Rhyl +0.0˚C Rhyl 79.2mm

Capel Curig -0.2˚C Capel Curig 148.0mm

Aberporth +0.1˚C Aberporth 54.2mm

Cardiff +0.0˚C Cardiff 43.8mm

Sennybridge -0.5˚C Sennybridge 88.6mm

Milford +0.5˚C Milford 65.2mm Haven Haven

Gorgaddan -0.2˚C Gorgaddan 75.4mm

V A L L E Y R H Y L C A P E L C U R I G

A B E R P O R T H

G O R G A D D A N S E N N Y B R I D G E M I L F O R D H A V E N C A R D I F F

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N O R T H E R N E N G L A N D T H E M I D L A N D S

Mean Temperature Monthly Rainfall Mean Temperature Monthly Rainfall

Carlise -+1.1˚C0.5˚C Carlise 42.0mm Birmingham -0.1˚C Birmingham 28.4mm Speadenum Speadenum

Blackpool +0.2˚C Blackpool 45.0mm Shawbury -0.2˚C Shawbury 35.0mm Black Black

+0.2˚C Rosthene +0.2˚C Rosthene 57.8mm Nottingham Nottingham 28.6mm

Sheffield +0.2˚C Sheffield 25.8mm Cambridge -0.9˚C Cambridge 15.4mm

Fylingdales +0.0˚C Fylingdales 51.8mm Marham -0.5˚C Marham 22.4mm

Durham +0.3˚C Durham 12.2mm Whattisham -0.5˚C Whattisham 15.6mm Speadenum Speadenum

Spadeadam -0.5˚C Spadeadam 39.6mm Speadenum Speadenum Mean Temperature Monthly Rainfall

S P A D E A D A M

C A R L I S E D U R H A M

S O U T H E R N E N G L A N D F Y L I N G D A L E S

B L A C K P O O L Mean Temperature Monthly Rainfall S H E F F I E L D R O S T H E N E Cambourne +0.5˚C Cambourne 71.5mm S H A W B U R Y N O T T I N G H A M

Plymouth -0.2˚C Plymouth 71.8mm M A R H A M B I R M I N G H A M C A M B R I D G W A T T I S H A M Exeter -1.1˚C Exeter 47.6mm E S T J A M E S’ P A R B E N S O N K -0.5˚C Yeovilton 32.0mm H E A T H R O W Yeovilton Y E O V I L T O N W I S L E Y H E R S T M O N S E U X Benson -1.3˚C Benson 21.8mm E X E T E R C A M B O U R N E P L Y M O U T H

Wisley -1.0˚C Wisley 20.4mm

Heathrow -0.5˚C Heathrow 29.2mm

St James’ -0.4˚C St James’ 29.8mm 6 Park Park

Charlwood -1.2˚C Charlwood 27.2mm