By Philip Eden
The pressure for June 2014 was above normal in all parts of the country with pressure anomaly ranging from +1mbar in Cornwall to +5.5mbar in Shetland and the Western Isles. The anomalous flow over the British Isles was east to north-easterly. All parts of the country were rather warm, most of the country was dry except for eastern Scotland, while sunshine duration was below normal in Scotland, near normal in northern England, and above normal in Wales, the Midlands and all of southern England.
Mean maximum temperature during June ranged from 22.1°C at Heathrow airport (London) to 12.6°C at Fair Isle (between Orkney and Shetland), while mean minimum temperature varied between 13.4°C at Southampton (Hants) and 8.1°C at Shap (Cumbria). Mean maxima were between 1.0 and 2.0 degC above normal in all regions, while mean minima where between 0.5 and 2.0 degC above, nationwide. The Central England Temperature (CET) of 15.5°C was 1.0 degC above the mean for 1981-2010; this was the warmest June only since 2010 but in the last 100 years only 9 Junes were warmer, three had the same mean temperature, while 88 were colder.
The highest maximum at a standard site (i.e excluding rooftop and mountain sites) in the UK was 26.5°C recorded at Writtle (Essex) on the 9th and Strathallan (Perthshire) on the 18th, while the lowest minimum was 1.0°C at Lake Bala (Merionethshire) on the 6th. The lowest daytime maximum was 8.9°C at Tredegar (Monmouthshire) on the 4th, while the warmest night was that of the 23rd/24th with a minimum of 16.2°C at St Catherine's Point (Isle of Wight).
Rainfall averaged over England and Wales during June was 50.1mm which is 75 per cent of the average for the standard reference period 1981-2010; this was the highest June rainfall only since June 2012 (the wettest on record). In the last 100 years 39 Junes have been drier. The equivalent figures for Scotland were 55mm and 93 per cent of the normal amount, and for Northern Ireland 42mm and 64 per cent. Monthly totals at routinely-available sites ranged from 95.0mm at Cardinham (Cornwall) and the very low figure of 6.6mm at Goudhurst and Frittenden (both in Kent). The heaviest daily fall was 56.8mm on the 28th at Boughton-under-Blean (Kent).
Sunshine averaged over England and Wales during June was 227.4 hours which is 117 per cent of the 1981-2010 mean, making this the sunniest June also since 2010. In the last 100 years 28 Junes were sunnier and 72 were duller. The equivalent figures for Scotland were 135 hours and 80 per cent, and for Northern Ireland 180 hours and 101 per cent. Largest total in the UK was 323 hours at St Helier (Jersey), and the smallest was 68 hours at Lerwick (Shetland) - lower than the lowest total for the individual months of May, April and March!
Strongest winds during June occurred on the 10th with gusts to 53 mph at Sule Skerry (off the north-western tip of Scotland).
By Philip Eden