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Wet July sees Shetland shine

Early statistics for 1-29 July show that it has been a wet month, with all areas receiving more than their average rainfall while temperatures have been close to average in most places.

The provisional statistics show that some areas have been particularly wet, due mainly to significant thunderstorms in the south. Hampshire for example has received 118% more than its average rainfall for the month.

The UK as a whole has received 22% more than the July average rainfall. Northern Ireland was the region with the most rainfall with 113.1mm, 39% above its monthly average.

All regions have been close to the average for sunshine hours, although only Scotland and Northern Ireland have received over the average. Notably, Shetland has seen more sunshine than Cornwall in July, and this is only the 8th time this has happened since records began in 1929. The Shetland area had 192.9 hours of sunshine while Cornwall had 153.5 hours.

Mean temperatures have been generally unremarkable on a wider scale, however locally there have been some larger anomalies. The Isle of Wight has been 0.8°C warmer than the July average, while in contrast East Lothianshire has been -0.8°C cooler than the average.

Climate Scientist Mike Kendon said: “Overall it hasn’t been a remarkable month for weather, however when you look more locally there have been some significant events. It is uncommon for Shetland to experience more sunshine hours than Cornwall at this time of year. There is also a notable gradient between a cooler, sunnier and slightly drier than average North-West and a wetter, dull and warmer than average South-East.

“Some of these statistics can be linked directly to a few significant weather events, with spells of thunderstorms bringing the majority of the month’s rainfall to some areas. The presence of low pressure systems moving slowly over the UK at times have also influenced the temperatures and amount of sunshine hours.”

1-29 July 2017 provisional figures

Early July 2017 data Mean temp (°C) Sunshine (hours) Rainfall (mm)
  Actual Diff to avg Actual % of avg Actual % of avg
UK 15.1 0.0 162.6 94   95.1 122
England 16.6 0.3 171.9 89   84.8 136
Wales 15.4 0.2 171.0 95 107.2 116
Scotland 12.8 -0.5 144.7 103 105.8 106
N Ireland 14.5 -0.1 162.6 116 113.1

139

The current period of changeable weather looks likely to last into the weekend with showers or longer spells of rain interspersed with drier weather and some sunshine. Next week it looks like high pressure will begin to build from the south which should eventually bring more settled, drier weather, although there may still be some showers at times, particularly for northern parts of the UK.

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