By Philip Eden
November was a rather cold but sunny month in all regions of the British Isles. It was quite wet until the 11th, but thereafter, with the exception of one day, it became very dry. That one day was the 20th when heavy rain (and some snow) fell in eastern Scotland and northeast England. The coldest episode was between the 19th and 25th when snow flurries fell as far south as the Chilterns and Cotswolds while frost was moderate to severe at night especially in Scotland and northern England.
Mean maximum temperature during November ranged from 11.6°C at St Mary's (Isles of Scilly) to 5.5°C at Dalwhinnie (Inverness-shire), while mean minimum temperature varied between 9.1°C at St Mary's (Isles of Scilly) and minus 0.2°C at Aboyne (Aberdeenshire). Both mean maxima and mean minima were between 0.0 and 1.5 degC below the 1981-2010 normal in all regions of the British Isles. The Central England Temperature (CET) of 6.1°C was 1.1 degC below the long-term mean, making this the coldest November since the very cold one of 2010. In the last 100 years 27 Novembers were colder, one had the same mean temperature, while 72 were warmer.
The highest maximum at a standard site (i.e excluding rooftop and mountain sites) in the UK was 16.5°C recorded at Exeter (Devon) on the 6th, while the lowest minimum was minus 8.1°C, at Braemar (Aberdeenshire) on the 25th. The lowest daytime maximum was 0.4°C at Carter Bar (Roxburghshire) on the 22nd, while the warmest night was that of the 10th/11th with a minimum of 13.0°C at St Mary's (Isles of Scilly).
Rainfall averaged over England and Wales during November was 64mm which is 61 per cent of the average for the standard reference period 1981-2010, making this the driest November for just two years November 2011 was the seventh driest in the last 100 years). In the last 100 years 21 Novembers were drier while 79 were wetter. The equivalent figures for Scotland were 89mm and 77 per cent of the normal amount, and for Northern Ireland 60mm and 55 per cent. Monthly totals at routinely-available sites varied between 274mm at Achnagart (Wester Ross) and 22mm at Inverbervie (Kincardineshire), Leuchars (Fife) and Leconfield (East Riding of Yorkshire). The heaviest daily fall was 55.4mm on the 20th at Chillingham Castle (Northumberland)
Sunshine averaged over England and Wales during November was 86 hours which is 123 per cent of the 1981-2010 mean; this was the sunniest November since 2006. In the last 100 years, 10 Novembers were sunnier, one had the same sunshine amount, and 89 were duller. The equivalent figures for Scotland were 76 hours and 154 per cent, and for Northern Ireland 80 hours and 155 per cent. Largest total in the UK was 115 hours at Leuchars (Fife) and the smallest was 34 hours at Lerwick (Shetland).
Strongest winds during November occurred on the 2nd with gusts to 77 knots at Mumbles Head (Glamorgan) and to 70 knots at Aberdaron (Caernarfon).
By Philip Eden