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Temperatures for all countries/dependencies after 31/12/2020 are estimated from non-quality controlled SYNOP data (12 hour max reported at 18Z, and 12 hour min reported at 06Z). Temperatures on or before this date are available for the UK only, and come from the quality controlled, official MIDAS Open dataset, courtesy of NCIC.
*Sites below 500m only

Maximum (06Z D to 18Z D, °C)
Highest38.0°C 19th March, (Lerwick, 82m)
Lowest8.0°C 8th February, (Scilly: St Marys Airport, 31m)
Minimum (18Z D-1 to 06Z D, °C)
Lowest-18.7°C 11th January, (Altnaharra No 2, 81m)
Highest7.6°C 25th May, (Killylane, 250m)
Maximum (06Z D to 18Z D, °C)
Lerwick (82m)38.019th March
Wiggonholt (28m)29.413th January
Kew Gardens (6m)29.31st May
High Beach (110m)29.19th January
London, St James's Park (13m)28.130th April
Blackpool, Squires Gate (10m)27.412th May
Manston (49m)27.212th June
Heathrow (25m)26.831st May
Charlwood (67m)26.52nd May
Bridgefoot (49m)26.129th April
Blackpool, Squires Gate (10m)25.911th June
Heathrow (25m)25.711th May
Heathrow (25m)25.730th May
Southampton, Oceanography Centre (m)25.720th May
Heathrow (25m)25.629th May
Porthmadog (7m)25.613th May
Glasgow, Bishopton (59m)24.817th May
Glasgow, Bishopton (59m)24.716th May
Southampton, Oceanography Centre (m)24.714th May
London, St James's Park (13m)24.528th April
Achnagart (15m)24.415th May
Castlederg (49m)24.118th May
Northolt (40m)24.012th April
Otterbourne W Wks (34m)23.74th April
Aboyne No 2 (140m)23.524th May
Heathrow (25m)23.510th May
Heathrow (25m)23.31st June
Killowen (4m)23.221st May
London, St James's Park (13m)23.211th April
Shoeburyness, Landwick (2m)23.110th June
Southampton, Oceanography Centre (m)23.03rd May
Aboyne No 2 (140m)22.810th April
Pershore (35m)22.823rd May
Heathrow (25m)22.62nd June
Hull, East Park (2m)22.427th April
Aboyne No 2 (140m)22.39th May
Frittenden (38m)22.228th May
Lossiemouth (6m)22.12nd April
Heathrow (25m)21.925th May
Heathrow (25m)21.99th June
Heathrow (25m)21.719th May
Heathrow (25m)21.76th June
Exeter Surfacenet Enclosure Aws (45m)21.65th April
Cardiff, Bute Park (9m)21.522nd May
Northolt (40m)21.320th March
Castlederg (49m)21.29th April
Tyndrum No 3 (168m)20.98th April
Heathrow (25m)20.826th May
Alice Holt Lodge (115m)20.73rd April
Kinbrace, Hatchery (103m)20.78th May
Drumnadrochit (53m)20.522nd April
Usk No 2 (25m)20.37th May
Heathrow (25m)20.14th June
Aviemore (228m)20.07th April
Coningsby (6m)20.03rd June
Culdrose (78m)20.022nd January
Kinlochewe (25m)20.01st April
Myerscough (14m)19.927th March
Wiggonholt (28m)19.826th April
Crosby (9m)19.79th March
Kinlochewe (25m)19.721st March
Teddington, Bushy Park (m)19.76th March
Heathrow (25m)19.68th June
Auchincruive (48m)19.423rd April
Cavendish (55m)19.426th March
Manston (49m)19.47th June
Otterbourne W Wks (34m)19.419th April
Syerston (66m)19.415th April
Aboyne No 2 (140m)19.231st March
Achnagart (15m)19.124th April
Bridgefoot (49m)19.18th March
Hereford, Credenhill (76m)19.05th June
Hurn (10m)19.06th April
Weybourne (21m)18.87th March
Cranwell (62m)18.714th April
Porthmadog (7m)18.76th May
Southampton, Oceanography Centre (m)18.725th March
Whitechurch (129m)18.622nd March
Heathrow (25m)18.517th April
Aultbea No 2 (11m)18.425th April
Hereford, Credenhill (76m)18.327th May
Coningsby (6m)18.118th April
London, St James's Park (13m)18.130th March
Manston (49m)18.113th April
Whitechurch (129m)17.920th April
East Malling (33m)17.821st April
Wiggonholt (28m)17.610th March
Plymouth, Mountbatten (50m)17.34th May
Castlederg (49m)17.25th May
Camborne (87m)17.04th March
Hull, East Park (2m)17.021st February
Exeter Surfacenet Enclosure Aws (45m)16.823rd March
Killowen (4m)16.824th March
Santon Downham (6m)16.55th March
Santon Downham (6m)16.516th April
Frittenden (38m)16.428th March
Kinloss (5m)16.420th February
Aboyne No 2 (140m)15.715th January
Kew Gardens (6m)15.524th February
Almondsbury (75m)15.15th February
London, St James's Park (13m)15.129th March
Southampton, Oceanography Centre (m)15.022nd February
Dunstaffnage (3m)14.918th March
Woburn (89m)14.617th March
Chivenor (6m)14.519th February
Okehampton, East Okement Farm (408m)14.516th January
Fyvie Castle (55m)14.42nd March
Tain Range (4m)14.417th January
Cassley (99m)14.214th January
Holbeach No 2 (3m)14.28th January
Lossiemouth (6m)14.123rd February
Exeter Airport No 2 (27m)13.95th January
Kew Gardens (6m)13.93rd March
Usk No 2 (25m)13.511th March
Kinlochewe (25m)13.33rd February
Killowen (4m)13.215th March
Santon Downham (6m)13.21st January
Scilly: St Marys Airport (31m)13.214th February
Swanage (10m)13.025th February
Plymouth, Mountbatten (50m)12.828th February
Preston, Moor Park (33m)12.712th March
Kinloss (5m)12.66th February
Aultbea No 2 (11m)12.51st February
Frittenden (38m)12.46th January
Cardiff, Bute Park (9m)12.327th February
Helens Bay (43m)12.316th March
Kinloss (5m)12.34th February
Armagh (62m)12.221st January
Usk No 2 (25m)12.21st March
Scilly: St Marys Airport (31m)12.119th January
Rochdale (110m)12.029th January
Scilly: St Marys Airport (31m)11.926th January
Coventry, Coundon (119m)11.831st January
Exeter Airport No 2 (27m)11.724th January
Gogerddan (31m)11.710th February
Scilly: St Marys Airport (31m)11.712th January
Scilly: St Marys Airport (31m)11.715th February
Threave (73m)11.720th January
Usk No 2 (25m)11.528th January
Nantwich, Reaseheath Hall (40m)11.426th February
Derrylin, Cornahoule (68m)11.318th January
Scilly: St Marys Airport (31m)11.311th January
Culdrose (78m)11.22nd February
Magilligan No 2 (6m)11.22nd January
Mona (62m)11.218th February
Scilly: St Marys Airport (31m)10.923rd January
Walney Island (15m)10.914th March
Armagh (62m)10.713th March
Aultbea No 2 (11m)10.77th February
Scilly: St Marys Airport (31m)10.727th January
Kenley Airfield (170m)10.67th January
Scilly: St Marys Airport (31m)10.617th February
Cardiff, Bute Park (9m)10.530th January
Scilly: St Marys Airport (31m)10.525th January
Nantwich, Reaseheath Hall (40m)9.913th February
Scilly: St Marys Airport (31m)9.916th February
Scilly: St Marys Airport (31m)9.710th January
Scilly: St Marys Airport (31m)9.712th February
Scilly: St Marys Airport (31m)9.04th January
Santon Downham (6m)8.99th February
Scilly: St Marys Airport (31m)8.711th February
Chivenor (6m)8.23rd January
Scilly: St Marys Airport (31m)8.08th February
Minimum (18Z D-1 to 06Z D, °C)
Altnaharra No 2 (81m)-18.711th January
Kinbrace, Hatchery (103m)-13.812th January
Loch Glascarnoch (265m)-13.36th January
Tulloch Bridge (237m)-12.49th January
Altnaharra No 2 (81m)-12.110th January
Loch Glascarnoch (265m)-11.05th January
Aviemore (228m)-9.314th February
Aboyne No 2 (140m)-8.64th January
Altnaharra No 2 (81m)-8.69th February
Aboyne No 2 (140m)-8.319th March
Benson (57m)-7.93rd January
Braemar No 2 (327m)-7.920th March
Aboyne No 2 (140m)-7.718th March
Aboyne No 2 (140m)-7.67th February
Altnaharra No 2 (81m)-7.610th February
Aviemore (228m)-7.513th February
Benson (57m)-7.316th March
Tulloch Bridge (237m)-7.08th January
Shap (255m)-6.915th March
Aboyne No 2 (140m)-6.820th January
Aviemore (228m)-6.88th February
Altnaharra No 2 (81m)-6.617th March
Fyvie Castle (55m)-6.522nd January
Altnaharra No 2 (81m)-6.315th February
Shap (255m)-6.32nd January
Benson (57m)-6.13rd March
Aboyne No 2 (140m)-5.819th January
Braemar No 2 (327m)-5.84th April
Topcliffe (25m)-5.86th February
Aboyne No 2 (140m)-5.528th February
Altnaharra No 2 (81m)-5.58th April
Benson (57m)-5.414th March
Kinbrace, Hatchery (103m)-5.418th April
Sennybridge No 2 (307m)-5.42nd March
Woburn (89m)-5.417th February
Benson (57m)-5.34th March
Topcliffe (25m)-5.37th January
Balmoral (283m)-5.223rd January
South Newington (105m)-5.21st March
Aboyne No 2 (140m)-5.11st February
Altnaharra No 2 (81m)-5.123rd May
Kinbrace, Hatchery (103m)-5.13rd April
Altnaharra No 2 (81m)-5.06th April
Sennybridge No 2 (307m)-5.012th March
Topcliffe (25m)-5.030th January
Altnaharra No 2 (81m)-4.916th April
Charlwood (67m)-4.95th March
Altnaharra No 2 (81m)-4.87th April
Altnaharra No 2 (81m)-4.76th May
Kinbrace, Hatchery (103m)-4.712th April
Aboyne No 2 (140m)-4.531st January
Katesbridge (91m)-4.513th March
Santon Downham (6m)-4.53rd February
Kinbrace, Hatchery (103m)-4.427th February
Aboyne No 2 (140m)-4.326th February
Altnaharra No 2 (81m)-4.35th April
Braemar No 2 (327m)-4.221st March
East Malling (33m)-4.22nd February
Kinbrace, Hatchery (103m)-4.222nd May
Woburn (89m)-4.218th February
Shawbury (72m)-4.116th January
Altnaharra No 2 (81m)-3.917th May
Santon Downham (6m)-3.926th January
Braemar No 2 (327m)-3.82nd April
Redesdale Camp (211m)-3.79th April
Balmoral (283m)-3.621st January
Benson (57m)-3.529th March
Kinbrace, Hatchery (103m)-3.515th May
Tyndrum No 3 (168m)-3.55th May
Redesdale Camp (211m)-3.410th April
Katesbridge (91m)-3.324th March
Kinbrace, Hatchery (103m)-3.216th May
South Newington (105m)-3.213th January
South Newington (105m)-3.16th March
South Newington (105m)-3.017th April
Aboyne No 2 (140m)-2.924th January
South Newington (105m)-2.71st April
Islay: Port Ellen (17m)-2.611th March
Braemar No 2 (327m)-2.523rd April
South Newington (105m)-2.514th April
Aboyne No 2 (140m)-2.426th March
Shap (255m)-2.410th March
Kinbrace, Hatchery (103m)-2.221st April
Loch Glascarnoch (265m)-2.215th April
Shobdon Airfield (99m)-2.217th January
South Newington (105m)-2.119th February
Frittenden (38m)-2.014th January
Hawarden Airport (14m)-2.018th January
Shobdon Airfield (99m)-2.025th January
Aboyne No 2 (140m)-1.85th February
Lentran (146m)-1.716th February
Katesbridge (91m)-1.613th April
South Newington (105m)-1.625th April
Topcliffe (25m)-1.631st March
Hurn (10m)-1.511th April
Shap (255m)-1.59th May
Shap (255m)-1.48th May
Cardinham, Bodmin (200m)-1.311th February
Santon Downham (6m)-1.327th March
Katesbridge (91m)-1.229th January
Santon Downham (6m)-1.225th March
Drumnadrochit (53m)-1.127th January
Redesdale Camp (211m)-1.110th May
Aboyne No 2 (140m)-1.09th March
Santon Downham (6m)-1.07th May
Topcliffe (25m)-1.015th January
Tulloch Bridge (237m)-1.028th January
Altnaharra No 2 (81m)-0.911th May
Topcliffe (25m)-0.925th February
Eskdalemuir (242m)-0.74th May
South Newington (105m)-0.74th February
Aboyne No 2 (140m)-0.522nd April
Loch Glascarnoch (265m)-0.524th April
Baltasound No 2 (15m)-0.38th March
Aboyne No 2 (140m)-0.220th May
Bala (163m)0.03rd May
Aboyne No 2 (140m)0.128th May
Eskdalemuir (242m)0.12nd May
Fyvie Castle (55m)0.123rd February
Santon Downham (6m)0.226th April
Braemar No 2 (327m)0.312th May
Bude (15m)0.412th February
Dalwhinnie No 2 (351m)0.418th May
Kinbrace, Hatchery (103m)0.61st January
Braemar No 2 (327m)0.721st May
Nantwich, Reaseheath Hall (40m)0.720th April
South Newington (105m)0.730th April
Aboyne No 2 (140m)1.09th June
Tulloch Bridge (237m)1.08th June
Marham (21m)1.427th April
Redesdale Camp (211m)1.420th February
Santon Downham (6m)1.414th May
Tain Range (4m)1.47th March
Aboyne No 2 (140m)1.528th March
Eskdalemuir (242m)1.56th June
Eskdalemuir (242m)1.511th June
Braemar No 2 (327m)1.613th May
Cavendish (55m)2.129th April
Eskdalemuir (242m)2.15th June
Aboyne No 2 (140m)2.427th May
Shobdon Airfield (99m)2.422nd February
Hurn (10m)2.628th April
Loch Glascarnoch (265m)2.74th June
Eskdalemuir (242m)2.81st May
Houghton Hall (65m)3.019th May
Redesdale Camp (211m)3.023rd March
Aviemore (228m)3.17th June
Baltasound No 2 (15m)3.219th April
Fyvie Castle (55m)3.222nd March
Fyvie Castle (55m)3.226th May
Sennybridge No 2 (307m)3.32nd June
Lerwick (82m)4.030th March
Resallach (133m)4.021st February
Altnaharra No 2 (81m)4.131st May
Baltasound No 2 (15m)4.429th May
Killylane (250m)4.624th February
Lerwick (82m)5.224th May
Dyce (66m)5.61st June
Loch Glascarnoch (265m)5.630th May
Baltasound No 2 (15m)6.110th June
Tain Range (4m)6.412th June
Lough Fea (225m)7.53rd June
Killylane (250m)7.625th May