The most notable feature of 2017 was the prevalence of westerly winds across the UK. TemperaturesThe average Central England temperature (including an estimate for the end of December) is 10.6°C, 0.6degC above average. The highest temperature of the year was 34.5°C at Heathrow (London) on the 21 June. The latter was the highest one-day total in 50 years of observations at Lancaster University weather station. West Wales was often cloudy in 2017 and the equivalent figure for Aberporth on the Cardigan Bay coast was only 79% (up to mid-December).

Source: The Guardian December 17, 2017 21:22 UTC