The last 5 Mays Weather in the UK according to Trevor Harley

2016 After an unsettled start the rest of the month was largely anticyclonic, with winds generally from the easterly direction, making it particularly warm and sunny in the west, and cooler and cloudier in the east. There was a more unsettled spell midmonth. It was warmer than average, with near average rainfall (92%). Overall sunshine was 115% of average. The highest temperature of the month was 27.7C at Plockton (Ross and Cromarty) on the 9th, and the lowest -5.7C at Tulloch Bridge (Invernessshire) on the 14th.

2017 The first ten days were anticyclonic with easterly winds, and the widespread drought continued. Thereafter it was much more unsettled with rain, bringing the drought to the end. There was a short hot sunny spell 24-26th, followed by a thundery breakdown. The month overall was very warm; nationally the second warmest May since 1910 (after 2008). It was particularly warm in Northern Ireland and Scotland. Rainfall was above average in the SE but lower in the rest of the country (83% overall). It was a sunny month (115%), particularly in the north and west. Northern Ireland was the sunniest region of the UK with an average of 253.2 hours (147%). The highest temperature of the month was 29.4C at Lossiemouth (Morayshire) on the 26th, and the lowest -5.1C at Shap (Cumbria) on the 9th. The wettest day was the 16th, when 66.0 mm of rain fell at Capel Curig (Conwy).

2018 A very warm month across the country, being the equal second warmest on record. The mean maximum temperature for the UK as a whole was the highest on record (from 1910). It was the sunniest May on record across the UK (132%). It was particularly sunny in northern England and parts of Scotland, and apart from west and south Cornwall. An early heatwave in the south and easts gave rise to the warmest Early May Bank Holiday on record (it was introduced in 1978), beating 1999, with 28.0 C in central London (St James Park) and 28.7 C at London Northolt. High pressure generally ruled throughout the month, with winds mostly from an easterly direction, so some haar along east coast. The last few days saw thunderstorms, some severe, with flooding, across parts of the South and Midlands. It was a dry month (with 69% of the average rainfall), particularly away from the thundery south. The lowest minimum was -4.6C at Aboyne on the 1st. 81.0 mm of rain fell at Winterbourne (West Midlands) on the 27-28th. In terms of the CET 13.2 was equal with 2017 but behind 1964 (13.3), 2008 (13.4), 1947 (13.5), and 1992 (13.6).

2019 A rather cool changeable month with some cold and warm spells. The final two days were very warm in the SE. Dry in Wales and the south but wetter elsewhere, giving an average of 93% of rainfall. Average sunshine although cloudier in the north. There was a fine spell in the north midmonth and indeed the highest temperature of the month was 25.8C at Kinlochwere (Ross and Cromarty) on the 15th. The lowest temperature was -6.2C at Kinbrace (Sutherland) on the 7th.

2020 Mostly a very anticyclonic month. It was a very sunny month, the sunniest month on record, with 143% of average, and was particularly sunny in England and Wales. An England and Wales average of 266 hours beat the previous record of June 1959. The highest sunshine total was recorded at Bournemouth, 339.5 hours. It was also a very dry month, overall with 47% of average rainfall, but it was extremely dry in the southeast. it was slightly warmer than average, although there some sharo frosts early and midmonth. The highest temperature of the month was 28.3C at Cromdale (Morayshire) on the 29th, and the lowest -6.6C at Kinbrace (Sutherland) on the 3rd. It was a wet month in the far NW: 97.2 mm of rain fell at Achnagart (Ross & Cromarty) on the 22-23rd.

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