Aye, their temperature forecasts are off, but its always the case. I never put any trust in them anyway, whether its above or below what they say:
http://www.metoffice.gov.uk/weather/uk/dg/edinburgh_forecast_weather.html
The problem with these type of forecasts, is that they dont't even bother to nowcast just by reading the thermometer or looking out of the window, Been too many times - especially in these easterly situations - where they say black is white, even when the evidence of our own eyes contradicts what they're saying.
Anyway, whats for us will no go past us ...or however the saying goes again