* Values qualified by an * are either (a) from rather sheltered sites or (b) more than 2°C above adjacent stations.
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
| JANUARY | |||
|---|---|---|---|
| C | F | ||
| 1 | 15.0 | 59 | Colwyn Bay (Conwy) 1910; Welshpool (Powys) and Shotwick (Flintshire) 1922 |
| 2 | 15.6 | 60 | Wistanstow (Shrops) 1925; Colwyn Bay (Conwy) 1932; Llandudno (Conwy) 1933 |
| 3 | 15.6 | 60 | Cannington (Somerset) 1948 |
| 4 | 15.6 | 60 | Llandudno (Conwy) 1921 and 1957 |
| 5 | 15.0 | 59 | Turnberry (Ayrshire) 1928 |
| 6 | 17.2 | 63 | Rhyl (Denbigh) 1916 |
| 7 | 15.0 | 59 | Rhyl (Denbigh) 1934; St Abb's Head (Borders) 1989 |
| 8 | 14.9 | 58.8 | Aber (Gwynedd) 1988 |
| 9 | 17.2 | 63 | Aber (Gwynedd) 1971 |
| 10 | 18.3 | 65 | Aber (Gwynedd) 1971; 18.2/64.8 Llandudno (Conwy) 1971 |
| 11 | 16.1 | 61 | Balmacara (Highland) 1971 |
| 12 | 16.5 | 61.7 | Colwyn Bay (Conwy) 1984 |
| 13 | 15.6 | 60 | Torquay (Devon) 1915 |
| 14 | 15.6 | 60 | Rhyl (Denbigh) 1930 |
| 15 | 16.0 | 60.8 | Colwyn Bay (Conwy) 1990 |
| 16 | 15.6 | 60 | Cullompton (Devon) 1920 |
| 17 | 17.2 | 63 | Colwyn Bay (Conwy) 1920 |
| 18 | 16.1 | 61 | Gordon Castle (Moray) 1932 |
| 19 | 16.1 | 61 | Sealand and Hawarden Bridge (both Flintshire) 1930 |
| 20 | 15.0 | 59 | Stratford-upon-Avon (Warws) 1954, Alderney (Channel Isles) 1960 |
| 21 | 15.0 | 59 | Torquay, Teignmouth, Starcross (all Devon) 1969 |
| 22 | 15.0 | 59 | Llandudno (Conwy) 1960 |
| 23 | 15.0 | 59 | Cardiff 1938 |
| 24 | 14.4 | 58 | Wisley (Surrey) 1937; Bramham (W Yorks) 1962 |
| 25 | 13.9 | 57.0 | Nantmor (Gwynedd) 1997; 13.6/56.5 Innsworth (Glos) 1977; Cardiff (Bute Park) 1983; 14 Poole (Dorset) 2003 |
| 26 | 18.3 | 64.9 | Aboyne (Grampian) 2003 |
| 27 | 18.3 | 65 | Aber (Gwynedd) 1958 |
| 28 | 15.4 | 59.7 | Burghill (Hereford) and Stratfield Turgis (Hants) 1887 |
| 29 | 15.5 | 59.9 | Lossiemouth (Moray) 1981; Llancresse (Guernsey) 2002 |
| 30 | 17.2 | 63 | Aber (Gwynedd) 1929 |
| 31 | 15.2 | 59.4 | Teignmouth (Devon) 1880 |
| Back To Index | |||
| FEBRUARY | |||
| C | F | ||
| 1 | 16.1 | 61 | Geldeston (Norfolk) 1898; Hodsock Priory (Notts) 1923 |
| 2 | 16.1 | 61 | Rhyl (Denbigh) 1944 |
| 3 | 16.7 | 62.1 | Lossiemouth (Moray) 2004 |
| 4 | 17.8 | 64.0 | Rettendon (Essex) 2004 |
| 5 | 16.5 | 61.7 | Aber (Gwynedd)1990 |
| 6 | 16.1 | 61.0 | Aber (Gwynedd)1990; 15.9/60.6 East Bergholt (Suffolk) 1989 |
| 7 | 16.8 | 62.2 | Durham 1993 |
| 8 | 15.9 | 60.7 | Hodsock Priory (Notts) 1903 |
| 9 | 16.3 | 61.4 | Cambridge- Botanic Gardens 1903 |
| 10 | 18.9* | 66* | Brixton (London) 1899 |
| 18.3 | 65 | Cambridge-Observatory, Regents Park (London), Llandudno (Conwy) 1899; 18.2/64.7 Ely (Cambs) 1899 | |
| 11 | 16.1 | 61 | Hawarden Bridge (Flintshire) and Cannington (Somerset) 1939; Dyce (Aberdeen) 1998 |
| 12 | 17.2 | 62.9 | Ashburton (Devon) 1896 |
| 13 |
19.7* 19.6* 19.5 |
67.5* 67.3* 67.1 |
*Greenwich (London) 1998; *Barbourne (Worcester) 1998 Tivington (Somerset) 1998 |
| 14 | 19.1 | 66.4 | Tivington (Somerset) 1998 |
| 15 | 18.1 | 64.6 | Prestatyn (Denbigh) 1998 |
| 16 | 16.1 | 61 | York, Wakefield (W Yorks), Arbroath (Angus) 1927 |
| 17 | 17.4 | 63.4 | Llandudno (Conwy) 1878; 17.2/63 Kensington Palace and Regent's Park (both London) 1950 |
| 18 | 18.3 | 65 | Kings Langley (Herts) 1945 |
| 19 | 16.7 | 62 | Rugby (Warws) 1945; Wrexham 1961 |
| 20 | 17.1 | 62.8 | Prestatyn (Denbigh) 1998 |
| 21 | 17.5 | 63.5 | Banchory (Aberdeenshire) 1974 |
| 22 | 17.9 | 64.2 | Aberdeen 1897 |
| 23 | 19.2 | 66.6 | March (Cambs) 1990 |
| 24 | 17.8 | 64 | Lairg, Nairn, and Glencarron (all Highland) 1891; 17.2/63 East Ham (London) 1921 |
| 25 | 16.6 | 61.9 | Dyce (Aberdeen) 1976 |
| 26 | 16.7 | 62 | Leeming (N Yorks) 1953 |
| 27 | 19.4 | 67 | Cambridge-Observatory 1891 |
| 28 | 19.1 | 66.3 | Harestock (Hants) 1891; 18.9/66 Greenwich (London) 1959 |
| 29 | 17.8 | 64 | Milford (Surrey) 1948; Wakefield (W Yorks) and Wyton (Cambs) 1960 |
| Back To Index | |||
| MARCH | |||
| C | F | ||
| 1 | 18.9 | 66 | Greenwich (London) 1959 |
| 2 | 20.2 | 68.4 | Exeter Airport (Devon) 1977 |
| 3 | 17.2 | 63 | Hunstanton (Norfolk), Attenborough (Notts), Barnstaple (Devon) 1939; Boxworth (Cambs) 1952 |
| 4 | 19.4 | 67 | St James Park (Westminster) 1928 |
| 5 | 19.4 | 67 | Leeming (N Yorks) 1950 |
| 6 | 19.4 | 67 | Redcar (N Yorks-Teesside) 1950 |
| 7 | 19.4 | 67 | Norwich 1906 |
| 8 | 21.1 | 70 | Colwyn Bay (Conwy) 1929 |
| 9 | 23.9 | 75 | Wealdstone (London) 1948 |
| 10 | 21.1 | 70 | Roade (Northants) 1929 |
| 11 | 22.8 | 73 | Aber (Gwynedd) 1957 |
| 12 | 23.3 | 74 | Haydon Bridge (Northumberland) 1957 |
| 13 | 21.1 | 70 | Peebles (Borders) 1957 |
| 14 | 20.6 | 69.1 | Gatwick (W Sussex) 1961 |
| 15 | 22.2 | 72 | Regents Park and Kensington Palace (London) 1961 |
| 16 | 22.8 | 73 | Goldington (Beds) 1961 |
| 17 | 22.2 | 72.0 | Enfield (London) 1990; 22.1/71.8 Cromer (Norfolk) 1990 |
| 18 | 22.3 | 72.1 | Cambridge-Botanic Garden 1990; 22.1/71.8 Mepal (Cambs) and Cromer (Norfolk) 1990 |
| 19 | 21.6 | 70.9 | Wisley (Surrey) 2005 |
| 20 | 21.4 | 70.5 | Rickmansworth (Herts) 1938 |
| 21 | 21.1 | 70 | Cambridge-Univ Farm 1938 |
| 22 | 20.0 | 68 | Lincoln 1918 |
| 23 | 22.2 | 72 | Geldeston (Norfolk), Bennington (Herts), and Shrewsbury 1918; Milford (Surrey) 1945 |
| 24 | 22.2 | 72 | Hodsock Priory (Notts) 1918 |
| 25 | 21.7 | 71 | Numerous England stations 1953 |
| 26 | 22.8 | 73 | Whitby (N Yorks) 1907 |
| 27 | 22.8 | 73 | West Witton (N Yorks) 1929 |
| 28 | 23.3 | 74 | Earls Colne (Essex) 1965 |
| 29 | 25.0 | 77 | Cromer and Santon Downham (both Norfolk) 1968 |
| 25.0* | 77* | Wakefield (W Yorks) 1929 and 1965 | |
| 30 | 23.9 | 75 | Cullompton (Devon) 1929 |
| 31 | 22.0 | 71.6 | Wryde (Cambs) 1907 |
| Back To Index | |||
| APRIL | |||
| C | F | ||
| 1 | 22.6 | 72.6 | Wryde (Cambs) 1907 |
| 2 | 23.9 | 75 | Leeming (N Yorks) 1946 |
| 3 | 25.6 | 78 | Hunstanton (Norfolk), Wakefield (W Yorks), Wealdstone (London), Whitstable (Kent) 1946 |
| 4 | 26.5 | 79.7 | Greenwich (London) 1946 |
| 5 | 22.8 | 73 | Cambridge-Observatory and Loughborough (Leics)1892 |
| 6 | 23.3 | 74 | Southampton 1892 |
| 7 | 22.0 | 71.6 | Achnashellach (Highland) 1974 |
| 8 | 24.4* | 76* | Brixton (London) 1894 |
| 24.1 | 75.3 | Cambridge-Observatory 1894 | |
| 9 | 23.9* | 75* | Southend-on-Sea (Essex)1969 |
| 22.8 | 73 | Mepal (Cambs) and numerous stations in London, Kent, Norfolk 1969 | |
| 10 | 23.3 | 74 | Cullompton (Devon), Maidenhead (Berks) 1909 |
| 11 | 26.0 | 78.8 | Wryde (Cambs) 1894 |
| 12 | 25.6 | 78 | Cromer (Norfolk), Herne Bay (Kent) 1939 |
| 13 | 23.0 | 73.4 | Rumleigh (Devon) 1991 |
| 14 | 24.4 | 75.9 | Jersey-St Louis 1943; 22.2/72 Trowbridge (Wilts) 1979 |
| 15 | 26.5 | 79.7 | Herstmonceux (E Sussex) 2007 |
| 16 | 29.4* | 85* | Camden Square (London)1949 |
| 28.9 | 84 | Kensington Palace, Wealdstone, Greenwich (all London ) 1949 | |
| 17 | 27.8 | 82 | Whitstable (Kent) 1949 |
| 18 | 26.1 | 79 | South Farnborough (Hants), Newport (I of Wight) 1945 |
| 19 | 25.6 | 78 | Cambridge- Observatory 1893 |
| 20 | 28.9 | 84 | Cambridge- Observatory 1893 |
| 21 | 28.1 | 82.6 | Ross-on-Wye (Heref)1893 |
| 22 | 26.2 | 79.2 | Jersey-St Louis 1984; 26.1/79 Cambridge 1901, 26.1*/79* Bawtry (S Yorks) 1901 |
| 23 | 26.1 | 79 | Cambridge-Observatory 1893 |
| 24 | 27.8 | 82 | Cambridge-Observatory 1893 |
| 25 | 27.8 | 82 | Cambridge-Observatory 1893 |
| 26 | 25.8 | 78.4 | Inverdruie (Highland) 1984 |
| 27 | 25.6 | 78 | New Malden (London) 1916 |
| 28 | 25.5 | 77.9 | Kinlochewe (Highland) 1984 |
| 29 | 25.8 | 78.4 | Creebridge (Dumfries and Galloway) 1993; 25.0/77 Margate and Herne Bay (both Kent) 1955 |
| 30 | 26.1* | 79* | Camden Square (London)1952 |
| 25.0 | 77 | Kensington Palace and Regents Park (both London) 1952; Aberdovey (Gwynedd) 1990; Nantwich (Cheshire) and Glentress (Borders) 1993 | |
| Back To Index | |||
| MAY | |||
| C | F | ||
| 1 | 27.4 | 81.3 | Lossiemouth (Moray) 1990 |
| 2 | 28.3 | 82.9 | Rothes (Moray) 1990 |
| 3 | 28.6 | 83.5 | Barbourne (Worcester) 1990; 28.1/82.6 Heathrow Airport (London) 1990 |
| 4 | 28.3 | 82.9 | Cheltenham (Glos) 1990 |
| 5 | 28.0 | 82.4 | Jersey- St Louis 1995: 27.8/82 Canterbury (Kent) 1923 |
| 6 | 28.6 | 83.5 | Cheltenham (Glos) 1995 |
| 7 | 29.0 | 84.2 | Waddon (London), Ulcombe (Kent) 1976 |
| 8 | 28.0* | 82.4* | Plumpton (E Sussex) 1976 |
| 27.2 | 81 | Kensington Palace (London) 1922 | |
| 9 | 27.8 | 82.0 | Southampton-Mayflower Park 1976 |
| 10 | 27.2 | 81 | Langar (Notts)1959 |
| 11 | 28.3 | 83 | Long Sutton, South Farnborough (both Hants) 1945 |
| 12 | 30.6* | 87* | Camden Square (London)1945 |
| 30.0 | 86 | Greenwich (London) 1945 | |
| 13 | 28.9 | 84.0 | Southampton-Mayflower Park 1998 |
| 14 | 30.0 | 86 | Bromley (London) 1943 |
| 15 | 28.2* | 82.8* | Lee-on-Solent (Hants) 1998 |
| 27.9 | 82.2 | Southampton-Mayflower Park 1998 | |
| 16 | 27.8* | 82* | Camden Square (London) 1925 |
| 27.2 | 81 | East Ham (London) 1925 | |
| 17 | 28.9 | 84 | Huddesfield-Oakes (W Yorks) 1952 |
| 18 | 30.0* | 86* | Camden Square (London) 1952 |
| 28.9 | 84 | Kensington Palace (London) 1952 | |
| 19 | 28.3 | 83 | Glenbranter (Argyll and Bute) 1948 |
| 20 | 29.5* | 85.1* | Barbourne (Worcester) 1992 |
| 28.3 | 83 | Hillington (Norfolk) 1910; 28.1/82.6 Cheltenham (Glos) 1992 | |
| 21 | 30.6* | 87* | Camden Square (London) 1922 |
| 29.2 | 84.6 | Towy Castle (Carmarthen) 1989 | |
| 22 | 32.8* | 91* | Camden Square (London) 1922 |
| 32.2 | 90 | Bexleyheath (London) 1922 | |
| 23 | 31.7 | 89 | Isle of Grain (Kent) 1922 |
| 24 | 32.2* | 90* | Camden Square (London) 1922 |
| 31.1 | 88 | Kensington Palace (London)1922 | |
| 25 | 31.7 | 89 | Farnham (Surrey), Heathrow Airport (London) 1953 |
| 26 | 29.3 | 84.7 | Norwood (London) 1880 |
| 27 | 30.7 | 87.3 | Heathrow (London) 2005 |
| 28 | 30.6* | 87* | Camden Square (London) 1944 |
| 28.3 | 83 | Kensington Palace (London), Rugby (Warws), Mansfield (Notts), Oaken (Staffs) 1944 | |
| 29 | 32.8 | 91 | Horsham (W Sussex), Tunbridge Wells (Kent), Regents Park (London) 1944 |
| 30 | 31.7 | 89 | Kensington Palace (London) 1947 |
| 31 | 32.2* | 90* | Camden Square (London)1947 |
| 31.7 | 89 | Mildenhall (Suffolk), Kensington Palace and Wealdstone (both London) 1947 | |
| Back To Index | |||
| JUNE | |||
| C | F | ||
| 1 | 31.7 | 89 | Mildenhall (Suffolk) 1947 |
| 2 | 33.3 | 92 | Hunstanton (Norfolk) 1947 |
| 3 | 34.4 | 94 | Waddington (Lincs), Kensington Palace (London)1947 |
| 4 | 31.1 | 88 | Glasgow Airport 1939 |
| 5 | 31.7* | 89* | Camden Square (London) 1933 |
| 31.1 | 88 | Rickmansworth (Herts) 1933; Kensington Palace (London) 1950 | |
| 6 | 33.3* | 92* | Camden Square (London)1950 |
| 32.8 | 91 | Southport and West Kirby (Merseyside), Manchester (Whitworth Park) 1950 | |
| 7 | 33.1 | 91.6 | St James's Park (Westminster) 1996: 32.9/91.2 Wattisham (Suffolk) 1996 |
| 8 | 32.2 | 90 | Cromer and Norwich (both Norfolk) 1915 |
| 9 | 32.8* | 91* | Cranwell (Lincs) 1940 |
| 31.1 | 88 | Cullompton (Devon) and Wakefield (W Yorks) 1940; 31.0/87.8 Gillingham (Kent) 1976 | |
| 10 | 31.7* | 89* | Maldon (Essex) 1970 |
| 30.6 | 87 | Terrington St Clement (Norfolk) 1940 | |
| 11 | 31.1 | 88 | Cambridge-Observatory 1900, 31.1*/88* Brixton (London) 1900 |
| 12 | 31.4 | 88.5 | Heathrow (London) 2006 |
| 13 | 28.3 | 83 | Earls Colne (Essex) 1948; 28.3*/83* Brixton (London) 1896; 28.3/82.9 Aboyne (Aberdeenshire) 1994 |
| 14 | 31.7 | 89 | Colmonell (S Ayrshire) 1896 |
| 15 | 30.7 | 87.2 | Brampford Speke (Devon) 1896 |
| 16 | 31.0 | 87.8 | Southampton 1893 |
| 17 | 33.9 | 93 | Little Massingham (Norfolk) 1917, 33.9*/93* Reading (Berks) 1917 |
| 18 | 32.2 | 90 | Ochtertyre (Perth and Kinross) 1893 |
| 19 | 32.8 | 91 | Southampton 1893, Coltishall (Norfolk) 2000; 32.6/90.7 Heathrow (London) 2005 |
| 20 | 31.7* | 89* | Camden Square (London)1936 |
| 31.6 | 88.9 | Jersey, St Louis 1998; 31.1/88 Tunbridge Wells (Kent) 1936 | |
| 21 | 31.7* | 89* | Camden Square (London)1936 |
| 31.1 | 88 | Thetford (Norfolk) 1936 | |
| 22 | 34.3* | 93.8* | Camden Square (London)1941 |
| 33.9 | 93 | Tottenham (London) 1941 | |
| 23 | 32.2 | 90.0 | Maldon (Essex) 1976 |
| 24 | 32.4 | 90.3 | Gillingham (Kent) 1976 |
| 25 | 33.5 | 92.3 | East Bergholt (Suffolk) 1976 |
| 26 | 35.4 | 95.7 | North Heath (W Sussex), East Dereham (Norfolk) 1976 |
| 27 | 35.5 | 95.9 | Southampton-Mayflower Park 1976 |
| 28 | 35.6 | 96.1 | Southampton-Mayflower Park 1976 |
| 29 | 35.6* | ||