British Weather Extremes: Summary

Disasters:
Avalanche: 8 killed when a cornice of frozen snow broke away in sunshine & fell about 60 m (about 200 ft) onto houses in Lewes (East Sussex), 27 December 1836.
Flood: 2,000 died around the Severn Estuary, 20 January 1606.
Lightning, annual total: 31 deaths in 1914.
Smog: 3,500-4,000 died, mostly children & the elderly, from acute bronchitis caused by smog in London, 4 to 9 December 1952.
Storm: approx. 8,000 killed by "The Channel Storm" of 26 November 1703.
Sunshine: approx. 40,000 new cases of skin cancer & approx. 2,000 deaths from skin cancer occur annually, with totals rising year-on-year.
Whirlwind: 74 killed when train plunged into sea from Tay Bridge (Tayside), after bridge collapsed under impact of 2 or 3 waterspouts, 28 December, 1879.

Fog:
Longest duration at low altitude: 4 days 18 hours in London, from 26 November to 1 December 1948 and again from 5 to 9 December 1952.

Precipitation:
Lowest mean: 513 mm (20.2 in), 1964-1982, at Lee Wick Farm, St. Osyth (Essex)
Highest mean: 4,391 mm (173 in) at Styhead Tarn (Cumbria).
Lowest in any year: 236 mm (9.3 in) at one station in Margate (Kent) in 1921.
Highest in any 24 hours: 279 mm (11 in) at Martinstown (Dorset) on 18 July 1955.
Highest in any month: 1430mm (56.3 in) at Styhead (Cumbria) in November 2009.
Highest in any year: 6,527 mm (257 in) at Sprinkling Tarn (Cumbria) in 1954.

Pressure:
Highest: 1054.7 hPa (31.15 in) at Aberdeen (Grampian) on 31 January 1902.
Lowest: 925.5 hPa (27.33 in) at Ochtertyre, near Crieff (Tayside) on 26 January 1884.

Sunshine:
Least in any month: nil, at Westminster, London, in December 1890.

Temperature:
Greatest diurnal range: 29 C (52.2 F), from -7 C (19.4 F) to 22 C (71.6 F) at Tummel Bridge (Tayside) on 9 May 1978.
Highest: 38.1 C (100.6 F) at Kew Gardens (London) on 10 August 2003.
Lowest: -27.2 C (-17 F) at Braemar (Grampian) on 11 February 1895 & 10 January 1982; and at Altnaharra (Highland) on 30 December 1995.
Warmest annual mean: 11.5 C (52.7 F) at Penzance (Cornwall) and on the Isles of Scilly, averaged from 1931 to 1960.

Wind:
Highest hourly mean: 159 km/h (99 mi/h) at Great Dun Fell (Cumbria) on 15 January 1968 and Lowther Hill, Scotland on 20 January 1963.
Highest annual mean at low altitude: 33.1 km/h (20.6 mi/h) at Fair Isle (Shetland), from 1974 to 1978.
Highest non-tornadic gust: 278 km/h (172 mi/h) on Cairn Gorm Summit on 20 March 1986.
Highest non-tornadic gust at low altitude: 228 km/h (142 mi/h) at Fraserburgh (Grampian) on 13 February 1989.
Highest wind in upper atmosphere: 656 km/h (408 mi/h) at 47,000 m (47 km) or 154,200 ft (29.2 mi) recorded by rocket above South Uist (Outer Hebrides) on 13 December 1967.
Strongest tornado: T8 (343-386 km/h, 213-240 mi/h) at St. Mary le Bow, central London on 23 October 1091 and Old Portsmouth to Southsea Common (Hampshire) on 22 September 1810.