Summary of my weather station data since 2007:
Years with below average mean max since 2007:
June: 2007, 2009, 2011, 2012, 2015, 2016 = 6/12
July: 2007, 2008, 2010, 2011, 2012, 2015, 2017 = 7/12
Aug: 2007, 2008, 2010, 2011, 2012, 2014, 2015 = 7/11
Years with below average sunshine since 2007:
June: 2007, 2009, 2010, 2011, 2012, 2014, 2015, 2016, 2017 = 9/12
July: 2007, 2008, 2010, 2011, 2012, 2015, 2016, 2017 =8/12
August: 2007, 2008, 2009, 2010, 2011, 2012 = 6/11
Years with above average rainfall since 2007:
June: 2007, 2008, 2009, 2011, 2012, 2016, 2017 = 7/12
July: 2007, 2009, 2010, 2011, 2012, 2013, 2015, 2016 =8/12
Aug: 2007, 2008, 2009, 2010, 2011, 2012,2014, 2015, 2017 = 9/11
June scores worse for sunshine, which I feel is the most important element, whereas August scores worst on temperature and rainfall. To be honest all three months have been dreadful and it's hard to identify any summer months that have been decent since 2007. It's become almost impossible to get a sunny, dry summer month.
June has been in terminal decline since the middle of the last century. Average sunshine has been 152 hours between 2007 and 2018 compared to 177 hours between 1971 and 2006 and 192 hours between 1920 and 1970. Obviously that got a big boost from this years total for 2007-17 the average was just 144 hours which is the same as March averaged for that period .
Sunshine averages for 2007-17/18 with 1971-2006 in brackets and 1920-70 in square brackets:
June: 152 hours (177 hours) [192 hours]
July: 158 hours (171 hours) [158 hours]
August: 149 hours (166 hours) [149 hours]
July and August sunshine levels have reduced but are in line with pre 1970s. It is June which used to be a sunny month which has declined drastically. July and August never used to be as good but now they're all as bad as each other
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