According to The Met Office in The Telegraph yesterday, June will be scorchio, while July and August will be washouts. I often cut out such long-term forecast bollox, to remind myself how inaccurate these things usually turn out to be.
As for the short term stuff, a five day forecast on the BBC website in the morning will be different from one in a newpaper on the same day, which will be different from the one on the BBC news in the evening.
One thing is, however, guaranteed. If the forecast for the next 5 days is good, you can sure that if the actual differs from the forecast, it will only be in a worse-than-forecast type way . . . .