You have to check your WU data, another glitch of WU/IBM
Last two lines in the file chartswudata/IEDINBUR98Y.txt are
2019-1-25,9.9,7.7,5.5,9.1,7.8,4.7,97,93,83,1007,1003,21,7,37,0.00
2019-1-26,9.5,8.9,8.4,8.5,7.6,6.2,95,90,84,1003,986,14,5,32,0.08
That data is loaded from WU. Not made by any script.
Maybe your settings at WU are misaligned for the timezone OR for the lat/lon???
No idea, Wim